Tuesday, 2 July 2019

NECO 2019 chemistry theory


No 1(e)
Pick any three
-it can be used to replace air and reduce or eliminate oxidation of materials.
-nitrogen is used is in dealing with liquid explosives as a safety measure
-It is use in aircraft fuel systems to reduce the fire hazard.
-it's use  in the production of electronic parts such as transistors, diodes and integrated circuits
2ai)
Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature And pressure are constant.
*Chemistry 4ai*
Sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation. Through sublimation, a substance changes from a solid to a gas without ever passing through a liquid phase
: No 2c(iii)
Pick any three
-Oxygen is a colorless, odorless, tasteless gas.
-it changes from a gas to a liquid at a temperature of -182.96°C (-297.33°F).
-temperature of -182.96°C (-297.33°F). ... The three allotropes ofoxygen are normal oxygen, or diatomicoxygen, or dioxygen; nascent, atomic, or monatomic oxygen; and ozone, or triatomic oxygen.
-is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element.
-Chemical Formula : O. Oxygen gas (O2). Ozone (O3)
-Combustion : Supports combustion but does not burn
-Oxidation : The common reaction in which it unites with another substance is called oxidation. Oxides of some metals form peroxides by the addition of oxygen

NECO 2019 Chemistry OBJ



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41ACDEEACBDB
51CCEBCBBCBD

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Thursday, 27 June 2019

Today's Literature NECO answers


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 4. *Section A*
The
widowhood experiences
of Yaremi, Dedewe, Fayoyin and Radeke are a
miscrosm of the plight of
widows in the larger
Nigerian society and in the
African continent as a
whole. The author condemns widow
inheritance, forced
remarriage and other
cultural practices that
subject widows to pain
and humiliation. ii)Loneliness: Another
important theme that
runs through the novel is
the theme of loneliness.
Yaremi was very lonely
and had to do most things by
herself. For instance, she had to appeal
to Uncle Deyo, Ajumobi’s
friend to assist in mending
her leaking roof and
rebuilding the walls of her
house. iii) Humiliation: Yaremi
suffered humiliation from
extended relations who
accused her of killing her
husband. Dedewe, Fayoyin
and Radeke also suffered humiliation. For instance,
Dedewe was made to sit in
a dark room by her
husband’s corpse while
Fayoyin’s hair was b@dly
shaved. Hardwork or Diligence: The theme of
diligence is expressed by
Yaremi’s industrious
character. The author uses
several anecdotes to
encourage hardwork

*8*SectionB*
There's a great deal of verbal irony in the conversation that Bigger has with his friends before his job interview with Mr. Dalton. When Bigger claims he could fly a plane if he had a chance, Gus replies, 'If you wasn't black and if you had some money and if they'd let you go to that aviation school, you could fly a plane.' This is verbal irony because Gus tells Bigger he can fly after listing all the reasons why he can't fly. It's sort of like saying 'Sure, you could eat a dodo egg. If you could find a dodo, which is extinct, and has been extinct for centuries.' This can illustrate how even with dark, depressing realities, humor can be found: it's the foundation of irony!
         A few lines later, Bigger says, 'It's funny how the white folks treat us, ain't it?' This is verbal irony because in reality, Bigger doesn't think it is funny at all.
 When Bigger takes an intoxicated Mary to her room to put her to bed, he becomes terrified when her blind mother walks in the door. He's absolutely sure that he will be fired for taking Mary out with her boyfriend and letting her be so drunk, or even worse. A black man in a young white girl's room could be seen as an even bigger problem. To keep from being caught, Bigger 'caught a corner of the pillow and brought it to her lips.' When Mary mumbled, Bigger pushed harder to muffle the sounds. By the time Mrs. Dalton leaves the room, Mary is dead. He's later sentenced to be executed for this crime. This is situational irony because Bigger's fear of getting fired leads to even bigger (no pun intended) problems.

One example of Wright's use of symbolism is the rat at the beginning of the novel. Parallels between Bigger and the rat are apparent. When the scene with the rat is more specifically examined, it becomes apparent that it is used to symbolize Bigger's emotions and feelings about his place in contrast to outside society. Richard Wright uses the rat scene to symbolize Bigger as a character and uses it as a tool to show many emotions Bigger has throughout the book.
             Richard Wright expresses the feeling of being trapped as Bigger instruct Buddy to "put that box in front of the hole so [the rat] can't get out" Bigger feels trapped inside barriers of society. Wright uses the rat to foreshadow the feeling of being trapped, which becomes apparent to the reader about Bigger as the story progresses.
             Bigger is "trapped" by society due to racism and poverty and this leads to his desire for rebellion. Again, Wright physically represents Bigger with the rat by have the rat bite Bigger after he is cornered in by Bigger and Buddy. Bigger has the emotion to rebel against whites, because he feels trapped by them into a world of hopelessness.
             Wright portrays the character of Bigger as this low class, poor, miserable man. Wright uses a white cat in the book to represent the idea of this "white power." A cat can be seen a luxurious animal, especially in comparison to a rat. This shows that Wright was using the rat to represent Bigger. The rat is a big ugly, black rat. Bigger as a character is not shown to be a character the reader likes but a disgusting, low class human being.
             Wright's use of symbolism in Native Son is an effective tool for foreshadowing and underlying structures throughout the book. The rat scene is effective in many ways because it seems so insignificant until more closely observed.





Wednesday, 26 June 2019

Today's NECO 2019 economics answers




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ECONOMICS OBJ

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 2a
.total amount=80+200+150+120+70=620million.
Percentage allocation to transport=80/620*100=12.9%
Percentage allocation to health=200/620*100%=32.26%
Percentage allocation to education=150/620*100%=24.19%
Percentage allocation to agriculture=120/620*100%=19.36%
Percentage allocation to tax=70/620*100%=11.29%: *Economics Theory Section B Solution by Star Light Solution Team*

Question Six
6a)
Capital market is a market where buyers and sellers engage in trade of financial securities like bonds, stocks, etc. The buying/selling is undertaken by participants such as individuals and institutions. Capital markets help channelise surplus funds from savers to institutions which then invest them into productive use. Generally, this market trades mostly in long-term securities.
Capital market consists of primary markets and secondary markets. Primary markets deal with trade of new issues of stocks and other securities, whereas secondary market deals with the exchange of existing or previously-issued securities. Another important division in the capital market is made on the basis of the nature of security traded, i.e. stock market and bond market.


1) In many instances, capital markets take the form of stock exchanges on which firms market debt securities such as bonds, and equity securities like stocks. Bondholders are creditors who lend money to institutions for a set period of time in exchange for interest payments. Stockholders are the owners of publicly listed companies and the funds from stock purchases are reinvested in the firm. Most firms issue both stock and bonds; these securities are typically marketable, which means that the original purchaser of the security can sell it on to another investor at a later date.
The advantages of capital markets such as stock exchanges include the fact that these locations provide a venue where those seeking finance can be connected to prospective lenders and investors.

2) capital market transactions also include private investment agreements between individuals and businesses. Some such deals are brokered by private equity firms that introduce investors to firm's seeking capital. In other instances, a business owner may directly approach an individual and ask for a loan or a
capital infusion. Many mainstream lenders are unwilling to finance start up firms or businesses engaged in speculative ventures. The advantages of capital markets also include the fact that high-risk borrowers can gain access to much needed funds.

3) Companies directly benefit from the capital markets because many firms would become insolvent in the absence of formal or informal investment marketplaces. The advantages of capital markets are also realized by employees of firms that grow and expand as a result of capital infusions. These individuals have more opportunity for career advancement and job promotion. Additionally, expanding firms open new plants and offices and along with new work venues, these firms also create new jobs.
As firms grow, new technologies are developed and researchers and marketing agents are employed to create and develop these products.

4) When large numbers of companies begin to hire additional workers, the economy of a particular country or region starts to expand because those workers reinvest their money in the economy when they buy goods. This means that profit levels start to increase at retail and manufacturing firms and these companies often use these funds to expand operations and create more jobs. Additionally, some publicly traded firms pass on profits to shareholders in the form of dividend payments. Consequently, investors indirectly benefit from their capital investments when they receive dividend disbursements.
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Question Nine
9)
1) Automatic fiscal stabilisers . In a recession, government tax revenues fall (e.g. people earn less so pay less income tax). Also, the government have to spend more on unemployment benefits. Therefore, in an economic downturn, borrowing rises. To eliminate borrowing in a recession would make the recession worse and increase inequality. If the government couldn’t borrow in a recession, the unemployed may not get any benefits and have no income. Also, higher taxes and lower spending would reduce domestic demand and make the recession even worse. (automatic fiscal stabilisers )

2) Political . The biggest tendency to borrow comes from political pressures. Voters generally like to hear the promise of lower taxes and increasing spending. A manifesto to tackle a budget deficit (higher taxes and lower spending) is unlikely to be popular. Voters often are supportive of the general idea of reducing government debt, but when it comes to actual policies like lower benefits, higher pension age, increased VAT rate, then it is likely to hit some particular pressure group with a vested interest in maintaining low tax and spending. For a government to increase borrowing is generally less politically damaging than increasing taxes. (though ironically, I feel austerity can be politically popular at all the wrong times )

3) Tax revenues are less than predicted. borrowing means the government can meet a temporary shortfall by borrowing, rather than having to immediately cut back on spending. Like an overdraft facility, government borrowing gives the government more flexibility and means they can maintain wages and spending commitments without having to keep cutting spending.

4) War . During a war, government spending is stretched leading to higher borrowing. The highest rates of borrowing occurred during the two world wars. Also, during wars, it may be easier to sell bonds as you can play the patriotic card to encourage people to finance government borrowing.
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Question Ten
*Question 10*

*(10a)*
Industrialization is a phenomenon in the development of nations, characterized by the growth of machine and power tools production, the growth of mechanical and technical skills (technology) required for industrial production, with attendant large-scale production all of which leads to changes in the social and economic organization of society.

*(10b)*
(I) To tackle the problem of managerial and technical know-how, the Centre for Management Training was made an agent of the Nigerian Enterprises Promotion Board. It was to help in training indigenous personnel. The Manufacturers’ Association of Nigeria and the Nigeria Employers’ Consultative Association were to organize seminars for indigenous personnel.

(II) To combat the issue of possible collusion and sabotage of the decree, the decree provided for very stiff penalties for any Nigerian found sabotaging the efforts of the decree. Any Nigerian found guilty of such criminal lack of patriotism was to pay a fine of N150,000.00 or go to jail for five years, or both. It is not easy to deal with the problem of a few Nigerians being enriched at the expense of the masses.

(III) To combat the possible problem of capital outflow in the short run, a member of regulations were made. There regulations included:
-    That there would be no repatriation of funds in cases where the masses were sold to non-Nigerians.
-    Repatriation was not allowed for the sale of real estates which were developed from funds generated locally, except on the final emigration of the owner

(IV) To combat the problem of capital shortage:
-    The federal government set up the Nigerian bank for commerce and industry. The primary objective was to provide the necessary funds for acquiring the businesses of foreigners affected by the decree.
-    Commercial banks were encouraged to give loans to prospective indigenous businessmen for acquiring the business of aliens.
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Question Eleven
11a)
Unemployment is a term referring to individuals who are employable and seeking a job but are unable to find a job. Furthermore, it is those people in the workforce or pool of people who are available for work that does not have a job. Usually measured by the unemployment rate, which is dividing the number of unemployed people by the total number of people in the workforce, unemployment serves as one of the indicators of an economy’s status.

11b)
1. Fiscal Policy of Government
Economic plan of any government depends on revenue and expenditure.
Fiscal policy shows how government spends the budget and collects revenues to run the country.
It collects revenue such as corporate and income tax, sales tax, custom duties and tariffs and spends it on repairs of roads and salary.
A Fiscal policy is either expansionary or contractionary, but we are focusing on the former.
Expansionary fiscal policy occurs when government reduces tax and spends more money to make the economy grow.
Because of this growth in the economy, individuals and firms have more money to spend, which raises output. This increase in production adds to growth and lowers unemployment in the economy.

2. Central Bank and Nigeria Monetary Policy
Monetary policy refers to money supply, interest rates, credit in the economy, and rules guiding the financial sector issued by the Central Bank of Nigeria (CBN) on behalf of the government.
Every year CBN makes rules for easy operation of the financial sector. It manages money supply by:
the lending rates going up
the lending rates going down
lending more
lending less
Lending rate affects individuals who borrow from banks to pay for their personal needs and firms who borrow from banks to grow their businesses.
Capital is crucial for any business to survive so companies must borrow at sensible interest rates to make profit.
Monetary policy makes it easy for companies to plan the time to borrow from their banks and do so when interest rates are low.
Getting a loan enlarges their business, which increases output and profit, and helps these companies create more jobs.

3. Government Spending
Due to limited resources and competing needs, it is difficult to get required funds from Government to fix infrastructures that need urgent repairs.
However, if government spends money to repair roads, purchase hospital equipment, and fix public schools, its effect on the economy is visible.
For example to repair any road, government must hire contractors who will employ people to work on the project sites.
The effect, repairing a road, will have on employment is that many laborers will get a job.
The second is that the job increases hired workers purchasing power.
The third is that people will patronize any support businesses, set up near any of the projects sites.

4. Agric Sector Reform
Agriculture is the second largest employer of labor in Nigeria. The agro allied value chain can become the hub for creating more jobs for Nigerians.
Let us use a recent case to support this claim. For example, in December 2016, Lagos state government sold Lake Rice to Lagos residents.
This happened due to a deal between Kebbi and Lagos State for the production of Lake Rice brand, and this alliance created many jobs.
Imagine that all states in the country copy this example, and produce one agric commodity; this would not only reduce unemployment but feed the country as well.
 ✍✍ *Economics* ✍✍
            *Solution*


*5*
*(Pick any five)*

(i) *_Inadequate Land Tenure System_:* The land tenure system in many areas does not encourage agricultural productivity. In some places, land is communally owned and farmers have no claim to the land after they have finished using it.  The communal system of land tenure has several adverse effects. People who wish to farm on a large scale and do not belong to the community may find it difficult to acquire enough land. In some places, non-members of the community who wish to farm on the community’s land may not be allowed to do so. The land cannot be sold to outsiders.

(ii)    *_Small Size of Farm_:* In many areas, the farms are very small as a result of land fragmentation. A piece of land is divided into smaller pieces and allotted to the sons of the family. The small size of farms makes the use of mechanized farming wasteful, and large-scale farming becomes impossible. There are therefore no economies of scale in production.

(iii)    *_Persistent Pest Attacks_:* The constant attacks on crops and animals by diseases and pests contribute to low productivity. Many crops are destroyed by diseases and pests before the harvesting period. Caterpillars, beetles, and army-worms destroy many crops. The mealybug has consistently been attacking cassava in many areas. The presence of tsetse fly causes cattle disease. The destruction of agricultural products by pests and diseases leads to a poor yield per hectare.

(iv)    *_Inadequate Farming Methods_:* Shifting cultivation is still practiced in some areas where there is abundant land and a very low population density. This method of farming wastes time and energy in clearing forests for the purpose of planting. It also aids soil erosion.

(v)    *_Poor Marketing Facilities_:* In many countries, organized marketing facilities are provided mainly for export crops. Facilities for the marketing and distribution of food crops are inadequate. Many farmers are not willing to increase output since they cannot easily market their products. Also, low fluctuating prices of agricultural products, brought about by some other constraints to agricultural development, discourage productivity.

(vi)    *_Poor Transportation Facilities_:* Many farming areas are not served with good roads or other means of transportation. Farmers in such remote areas therefore finds it difficult to evacuate their agricultural produce for sale. Many of the farm products perish before they reach their destination due to the bad roads and inadequate feeder roads. Farmers in such areas are therefore forced to curtail their production since large-scale production does not yield them much dividend.

(vii)    *_Inadequate Storage Facilities_:* At present, there are inadequate storage facilities for many crops such as silos for grain, cold rooms for perishable commodities, etc. These are either not available or insufficient. Agricultural products are spoiled while being stored under inadequate tropical conditions due to attack by pests or adverse weather conditions. This reduces the farmer’s incentive to produce on a large scale.


*6a*


*Definition of 'Capital Market' Definition:*

 Capital market is a market where buyers and sellers engage in trade of financial securities like bonds, stocks, etc. The buying/selling is undertaken by participants such as individuals and institutions.

*No. 6b*

*Savings*

Investing in securities that are listed in the Capital or Stock market encourages inv fbestors to accumulate their savings in small amounts over time

*Income*

Investment in the stock market provides a source of income. Shares pay dividends when companies declared profits and decide to distribute part of the profits to shareholders. Bonds pay an interest income to the bondholders.  Sometimes the income earned from listed securities is higher than interest earned from the money or banking sector.

*Wealth or Capital gain*

Whenever the prices of securities listed in the market go up, the value of the investment of the holders of those securities increases.  This is called capital gain and is an important way of growing wealth through the stock market.  It is important to note that a one –off investment in the Capital market does not make sense.  It is therefore the accumulative investment over time that creates opportunities for growth in wealth through the Capital Market.

*Securities as Collateral*

Listed securities are easily acceptable as collateral against loans from financial institutions.

*Liquidity*

Liquidity is the ability to convert shares or bonds into cash by selling within the shortest time possible without losing much value.  When one needs funds urgently, listed securities could be very useful because they are more liquid than most other forms of assets.

Bonds pay an interest income and shares pay dividends income

*Grow wealth*: Over time, the value of your investment increases, whenever the prices of your stock go up. This is called capital gains.

Listed securities are easily acceptable as collateral against loans.

 10a


*Industrialization* is the process by which an economy is transformed from primarily agricultural to one based on the manufacturing of goods. Individual manual labor is often replaced by mechanized mass production, and craftsmen are replaced by assembly lines


 *11a* )
Unemployment is a situation where some people who fall within the ages of the working population, capable and willing to work are unable to obtain befitting work to do.

11b)
i ) *Achieving industrialization:* Establishing many industries will create more employment opportunities.
ii) *Population Control:* Optimum population will help to to solve our unemployment problem because it will bring our population to equilibrium point with out resources.
iii) **Good development plans* schools and colleges should be established based on the available places that will absorb the products of these institutions


 10a


*Industrialization* is the process by which an economy is transformed from primarily agricultural to one based on the manufacturing of goods. Individual manual labor is often replaced by mechanized mass production, and craftsmen are replaced by assembly lines

: *No. 6b*

*Savings*

Investing in securities that are listed in the Capital or Stock market encourages inv fbestors to accumulate their savings in small amounts over time

*Income*

Investment in the stock market provides a source of income. Shares pay dividends when companies declared profits and decide to distribute part of the profits to shareholders. Bonds pay an interest income to the bondholders.  Sometimes the income earned from listed securities is higher than interest earned from the money or banking sector.

*Wealth or Capital gain*

Whenever the prices of securities listed in the market go up, the value of the investment of the holders of those securities increases.  This is called capital gain and is an important way of growing wealth through the stock market.  It is important to note that a one –off investment in the Capital market does not make sense.  It is therefore the accumulative investment over time that creates opportunities for growth in wealth through the Capital Market.

*Securities as Collateral*

Listed securities are easily acceptable as collateral against loans from financial institutions.

*Liquidity*

Liquidity is the ability to convert shares or bonds into cash by selling within the shortest time possible without losing much value.  When one needs funds urgently, listed securities could be very useful because they are more liquid than most other forms of assets.

Bonds pay an interest income and shares pay dividends income

*Grow wealth*: Over time, the value of your investment increases, whenever the prices of your stock go up. This is called capital gains.

Listed securities are easily acceptable as collateral against loans.

[Question 5*
*(Pick any five)*

(i) *_Inadequate Land Tenure System_:* The land tenure system in many areas does not encourage agricultural productivity. In some places, land is communally owned and farmers have no claim to the land after they have finished using it.  The communal system of land tenure has several adverse effects. People who wish to farm on a large scale and do not belong to the community may find it difficult to acquire enough land. In some places, non-members of the community who wish to farm on the community’s land may not be allowed to do so. The land cannot be sold to outsiders.

(ii)    *_Small Size of Farm_:* In many areas, the farms are very small as a result of land fragmentation. A piece of land is divided into smaller pieces and allotted to the sons of the family. The small size of farms makes the use of mechanized farming wasteful, and large-scale farming becomes impossible. There are therefore no economies of scale in production.

(iii)    *_Persistent Pest Attacks_:* The constant attacks on crops and animals by diseases and pests contribute to low productivity. Many crops are destroyed by diseases and pests before the harvesting period. Caterpillars, beetles, and army-worms destroy many crops. The mealybug has consistently been attacking cassava in many areas. The presence of tsetse fly causes cattle disease. The destruction of agricultural products by pests and diseases leads to a poor yield per hectare.

(iv)    *_Inadequate Farming Methods_:* Shifting cultivation is still practiced in some areas where there is abundant land and a very low population density. This method of farming wastes time and energy in clearing forests for the purpose of planting. It also aids soil erosion.

(v)    *_Poor Marketing Facilities_:* In many countries, organized marketing facilities are provided mainly for export crops. Facilities for the marketing and distribution of food crops are inadequate. Many farmers are not willing to increase output since they cannot easily market their products. Also, low fluctuating prices of agricultural products, brought about by some other constraints to agricultural development, discourage productivity.

(vi)    *_Poor Transportation Facilities_:* Many farming areas are not served with good roads or other means of transportation. Farmers in such remote areas therefore finds it difficult to evacuate their agricultural produce for sale. Many of the farm products perish before they reach their destination due to the bad roads and inadequate feeder roads. Farmers in such areas are therefore forced to curtail their production since large-scale production does not yield them much dividend.

(vii)    *_Inadequate Storage Facilities_:* At present, there are inadequate storage facilities for many crops such as silos for grain, cold rooms for perishable commodities, etc. These are either not available or insufficient. Agricultural products are spoiled while being stored under inadequate tropical conditions due to attack by pests or adverse weather conditions. This reduces the farmer’s incentive to produce on a large scale.

 1a) Income elasticity of demand is the degree of responsiveness of demand to changes in the income of  consumers.

1d) Bournvita to Mr. Dantani is a normal goods. That is so because when Mr. Dantani's income rose from N300,000 to N600,000, his demand for bournvita also increased from 150 to 250, thus indicating positive elasticity. This is usually the case with normal goods

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NECO 2019 Financial accounting solutions



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 (1a)
(i)discount allowed means the discount which is given by a seller to the buyer. While discount received means the discount received by the seller for purchases made

(ii)Discount allowed is that amount which is given by our company to others while discount received is that amount which is received by our company from others.

(1b)
(i)Petty cash book
(ii)Cash book
(iii)Returns outwards book
(iv)Sales returns book
(v)Purchase day book or journal

(1ci)
(i)An item that is entered on the wrong side of the trial balance.
(ii)An item can be omitted from the trial balance.

(1cii )
(i)Error of omission
(ii)Error of compensation
(iii)Error of principle


(2i)
Preference shares: Preference shares are shares in a company that are owned by people who have the right to receive part of the company's profits before the holders of ordinary shares are paid. They also have the right to have their capital repaid if the company fails and has to close.

(2ii)
Goodwill: Goodwill  is an intangible asset that arises when a buyer acquires an existing business.The goodwill amounts to the excess of the "purchase consideration" (the money paid to purchase the asset or business) over the total value of the assets and liabilities.

(2iii)
Three column cashbook: Three column cashbook is the book of original Entry which is used to record all cash received and payment. It is usually a column or sometimes a bank column only.The cash book can be divided into two sides;Debit (Dr) sides  and Credit (Cr)sides.



(2iv)
Bank reconciliation statement: Bank reconciliation statement is a process that explains the difference on a specified date between the bank balance shown in an organization's bank statement, as supplied by the bank and the corresponding amount shown in the organization's own accounting records.


(2v)
Depreciation: Depreciation can be defined as a reduction in the economic service potential of an asset as a result of wears,tears,usage and passage of time. When fixed assets are sold, the part of cost are recovered is termed depreciation


(4a)
(i) Simple Cash Book
(ii) Two Column Cash Book
(iii) Petty Cash Book
(iv) Three Column Cash Book

(4b)
A bad debt is an account receivable that has been clearly identified as not being collectible while provision for bad debt  accounts is a valuation account that represents an estimate of the amount of receivables that a company does not expect to collect.

(4c)
(i)Dormant / Inoperative Account; If account is dormant or inoperative then bank can dishonor the Cheque.

(ii)Account Number; If account number is not mentioned in Cheque clearly or it is absent. Then bank dishonor the Cheque.

(iii)Signature Differ;  Sometime you forget your signatures as you did while opening your bank account. Bank will dishonor the Cheque if your(drawer) signature don’t match with specimen available in bank record.

(iv)Payee Name; If payee name is absent then bank can dishonor the Cheque with the reason that “Payee Name Required”.

(v)Amount in Words and Figures; Bank dishonour the Cheque if amount written in words and figures are different. So, avoid this mistake(NUMBER 2)

(2i)
Preference shares:-Preference shares are shares in a company that are owned by people who have the right to receive part of the company's profits before the holders of ordinary shares are paid. They also have the right to have their capital repaid if the company fails and has to close.


(2ii)Goodwill:-Goodwill  is an intangible asset that arises when a buyer acquires an existing business.The goodwill amounts to the excess of the "purchase consideration" (the money paid to purchase the asset or business) over the total value of the assets and liabilities.

(2iii)
Three column cashbook:-Three column cashbook is the book of original Entry which is used to record all cash received and payment. It is usually a column or sometimes a bank column only.The cash book can be divided into two sides;Debit (Dr) sides  and Credit (Cr)sides.


(2iv)
bank reconciliation statement:-Bank reconciliation statement  is a process that explains the difference on a specified date between the bank balance shown in an organization's bank statement, as supplied by the bank and the corresponding amount shown in the organization's own accounting records.


(2v)
Depreciation :-Depreciation can be defined as a reduction in the economic service potential of an asset as a result of wears,tears,usage and passage of time. When fixed assets are sold ,the part of cost are recovered is termed depreciation
(4a)
(i) Simple Cash Book
(ii) Two Column Cash Book
(iii) Petty Cash Book
(iv) Three Column Cash Book

(4b)
A bad debt is an account receivable that has been clearly identified as not being collectible while provision for bad debt  accounts is a valuation account that represents an estimate of the amount of receivables that a company does not expect to collect.

(4c)
(i)Dormant / Inoperative Account; If account is dormant or inoperative then bank can dishonor the Cheque.

(ii)Account Number; If account number is not mentioned in Cheque clearly or it is absent. Then bank dishonor the Cheque.

(iii)Signature Differ;  Sometime you forget your signatures as you did while opening your bank account. Bank will dishonor the Cheque if your(drawer) signature don’t match with specimen available in bank record.

(iv)Payee Name; If payee name is absent then bank can dishonor the Cheque with the reason that “Payee Name Required”.

(v)Amount in Words and Figures; Bank dishonour the Cheque if amount written in words and figures are different. So, avoid this mistake.
*BONUS ANSWER FOR SECTION A*

(4a)
(i)Single column cash book
(ii)Double column cash book
(iii)Three column cash book
(iv)Petty cash book


(4b)
Bad debt are those debt that cannot be recovered ie irrecoverable debts.such a debt must be written off from the debtor balance so that the accounts will not give a false picture
While
Provision for bad debts is an estimated amount set aside for doubtful debts which cannot be accurately calculated.The provision must be charged to the profit and loss as expenses and deducted from the debtors balance in the balance sheet

(4c)
[PICK FIVE]
(i)When payment is stopped by owner before encashment
(ii)When a postdate cheque is presented earlier than the date written on it
(iii)When the cheque is more than six months from the date written on it
(iv)When the bank has notice of the death of the drawer before the cheque is presented
(v)When the court declares the drawer bankrupt before the cheque is presented
(vi)when the signature on the cheque differ from the one on the signature card at the bank /irregular signature
(vii)when there is an alteration on the cheque and the alterations is not initiated by the drawer
(7a)
STATEMENT OF AFFAIR AS AT 1ST JANUARY 2017

TABULATE

-DR-
Accumulated funds 43,800

CURRENT LIABILITIES
Bar supplies 2,400

Total = 46,200


-CR-
FIXED ASSET
Equipment 25,000
Furniture/fittings 20,000

CURRENT ASSET
Stock bar 1,200

Total = 46,200


(7b)
BAR TRADING ACCOUNT FOR THE YEAR 2017

TABULATE

-DR-
Opening stock 1,200
Add purchase 28,500
Less C/stock 3,200
Cost of goods sold 26,500
Gross profit 18,500

Total = 45,000

Wage bar 3,500
Bar expenses 800
Net profit 14,200

Total = 18,500

-CR-
Sales. 45,000

Total = 45,000

Gross profit b/d 18,500

Total = 18,500

(7c)
INCOME AND EXPENDITURE ACCOUNT

General expenses 4,000
Printing & stationary 1,200
Ameno day celebration 30,000
Excess of income 24,000
Over expenditure = 59,200

2019 NECO biology answers

Always comeback every 5minutes to refresh this page....
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.BIOLOGY OBJ
1-10: EDBABEBAEA
11-20: EACDABAAED
21-30: ACBDBDEACE
31-40: DACBEABBAD
41-50: BADDDDBCAD
51-60: BDAEBCBACA
 (3a)
(i) Bones are rigid, non-flexible, and tough, whereas cartilage is flexible and are soft-elastic.
(ii) Bones grow in both directions (bidirectional) while cartilage grows in the single direction (unidirectional).
(iii) Bones cells are also known as Osteocytes while cartilage cells are also known as Chondrocytes.
(iv) Bones are active participants of blood supply; Cartilage are not the participants in blood supply, except in perichondrium.

(3aii)
(i) Hydrostatic skeleton
(ii) Exoskeleton
(iii) Endoskeleton.

(3bi)

(3bii)
- Parenchyma
- Collenchyma
- Sclerenchyma
- Xylem
- Phloem
Biology answer
No 1
Tadpoles------ Gills
Cockroaches-- spiracles, trachea .
Domestic fowl.....lungs
Talinum.......Stomata
Earthworm ......Diffusion through skin
Amoeba ..... Cell membrane
1ai)
Sexual reproduction:This is a type of reproduction which involves the fussion of male gametes(eg sperm cell) and the female gametes(eg egg cell) to form zygote which later develops to a young offspring
1aii)
-Abstinence
-Birth Control Sponge (Today Sponge)
-Birth Control Vaginal Ring (NuvaRing)
-Birth Control Shot (Depo-Provera)
-Birth Control Implant (Implanon and Nexplanon)
1aiii)
-Mutualism represents a symbiotic relationship where both species involved benefit from the relationship while commensalism represents a symbiotic relationship where only one organism benefits while the other does not benefit from the relationship
-Good examples for mutualism include the relationship between bees and flowers as well as humans and digestive bacteria while Examples for commensalism include hermit crabs using dead gastropods for shelter or millipedes travelling on birds
1b)
i)Hooks and suckers allow it to hold on tightly to the wall of the intestine
ii)Its flat body gives it a large surface area to absorb food
iii)It has no need of a mouth or gut as it absorbs already digested food
1ci) See the diagram.
(No6i)
Lightning. 1. A discharge of atmospheric electricity, accompanied by a vivid flash of light, commonly from one cloud to another, sometimes from a cloud to the earth. The sound produced by the electricity in passing rapidly through the atmosphere constitutes thunder.
(6ii)Nitrosomonas A genus of gram-negative, ellipsoidal or rod-shaped bacteria whose major source of energy and reducing power is from the oxidation of ammonia to nitrite. Its species occur in soils, oceans, lakes, rivers, and sewage disposal systems
B-A TEAM
(6iii)Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime.
3c
i) Saprophytes are plants, fungi, and microorganisms that feed on dead or decaying matter (or, in more current and specific usage, they feed on the fungi that feed on the decaying material).
ii) examples are
----> molds
----> ghost plant or Indian pipe
---->mushrooms
---->gnome plant.
=========================
3c
i) Saprophytes are plants, fungi, and microorganisms that feed on dead or decaying matter (or, in more current and specific usage, they feed on the fungi that feed on the decaying material).
ii) examples are
----> molds
----> ghost plant or Indian pipe
---->mushrooms
---->gnome plant.
(No6i)
Lightning. 1. A discharge of atmospheric electricity, accompanied by a vivid flash of light, commonly from one cloud to another, sometimes from a cloud to the earth. The sound produced by the electricity in passing rapidly through the atmosphere constitutes thunder.
B-A TEAM
(6ii)Nitrosomonas A genus of gram-negative, ellipsoidal or rod-shaped bacteria whose major source of energy and reducing power is from the oxidation of ammonia to nitrite. Its species occur in soils, oceans, lakes, rivers, and sewage disposal systems
B-A TEAM
(6iii)Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime
5ai)
Commensalism, in biology, a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

ii)
Remora fish

iii)
GRAY WATER

RAINWATER COLLECTION

Condensate Water

5b PICK ANY THREE
(ii)
- filtering, settling, dissolving, absorption,
-. The forest cover should be protected by restricting defores­tation and through adoption of afforestation programmes.
-The main source of air pollution is the automobiles; therefore, their engines should be redesigned in such a way that their emissions cause minimum pollution. Several steps have been taken and some technology has also been developed, but still it is in a very preliminary stage.

-use of filters and after burner,
-Engine should be well tuned, and
-Mixing of anti-tibs in diesel and petrol,

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Difference between bone and cartilage

Pick any four


UNDER BONE
-They are rigid, non-flexible, and tough.
-Bones grow in both directions (bidirectional)
-Haversian system and Volkmann's canals are present.
-Bone marrow is present (it is a kind of haematopoietic tissue from which all blood cells are made).
-Lacunae possess canaliculi where each lacuna consist of only one cell (osteocyte).


Under cartilage
-They are flexible and are soft-elastic.
-Cartilage grows in single direction (unidirectional)
-Haversian system and Volkmann's canals are absent.
-Bone marrow is absent.
-Lacunae do not possess canaliculi, and each lacuna has two-three chondrocytes.

Tuesday, 25 June 2019

Today's NECO agriculture (answers)

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*AGRIC*
(8a)
(i)Uses of animals and their health problems
(ii)Organs and systems of an animal body
(iii)Rumen movement in ruminants
(iv)Appearance of the healthy animal

(8bi)
-Rinderpest-
(i)quarantine and slaughter.
(ii)vaccination

(8bii)
-Aspergillosis-
(i)Good hatchery sanitation
(ii)Avoidance of mouldy feed

(8biii)
-Anthrax -
(i)Cut off infection source.
(ii)Dispose of anthrax carcasses correctly

(8biv)
(i)Vaccination
(ii)Isolation of suspected animals

(8c)
(i)Poor growth
(ii)High competition for survival
(ii)It could lead to death of animal
(iv)It can lead to cannibalism
*2019 AGRICULTURAL SCIENCE ANSWERS*
================================
OBJ LOADING
================================
*INSTRUCTION: ANSWER ANY, _one_ QUESTION FROM EACH SECTION*
================================
*SECTION A*

(2a)
Farm surveying is the process of measuring and mapping out the position, height, size and boundary of an area of farmland.

(2aii)
(i)Air movement
(ii)Good drainage
(iii)An adequate supply of clean water

(2b)
(i)Store in cool dry place
(ii)Lubricate the moving parts
(iii)By painting to avoid rusting

(2c)
(i)Poor infrastructure
(ii)Dormant research facilities
(iii)Government policies
(iv)Poor education and modernization

(2d)
(i)to effect structural change in the system of land tenure;
(ii)to achieve fast economic and social transformation;
(iii)to negate economic inequality caused by the appropriation of rising land values by land speculators and land holders; and
(iv)to make land available easily and cheaply, to both the government and private individual developers.
================================
*SECTION B*

SOLVING AND TYPING
================================
*SECTION C*

SOLVING AND TYPING
================================
*SECTION D*

(8a)
(i)Uses of animals and their health problems
(ii)Organs and systems of an animal body
(iii)Rumen movement in ruminants
(iv)Appearance of the healthy animal

(8bi)
-Rinderpest-
(i)quarantine and slaughter.
(ii)vaccination

(8bii)
-Aspergillosis-
(i)Good hatchery sanitation
(ii)Avoidance of mouldy feed

(8biii)
-Anthrax -
(i)Cut off infection source.
(ii)Dispose of anthrax carcasses correctly

(8biv)
(i)Vaccination
(ii)Isolation of suspected animals

(8c)
(i)Poor growth
(ii)High competition for survival
(ii)It could lead to death of animal
(iv)It can lead to cannibalism
================================
*SECTION E*

(10ai)
The law of diminishing returns states that in a production process, as on input variable is increased, there will be a point at which the marginal per unit will start to decrease holding all other factors constant.

(10aii)
(i) Price of related commodities 
(ii) Price of rice
(iii)  Income of the consumers
(iv) Expectation of change in the price in future
(v) Taste of consumers
(vi)  Smuggling of rice

(10bi)
 Total depreciation = Cost price - Selling price

Given that the cost of rice = N108,000
Selling price = N93,000

Total depreciation = 108,000 - 93,000 = N15,000

(10bii)
Annual depreciation = Total depreciation/ Life span

Total depreciation = N15,000
Life span = 2017-2007
Life span = 10years

Annual depreciation = 15,000/10 = N1,500

(10ci)
(i) Inadequate support of rural farmers to the extension workers
(ii) Not getting the problems to solve at hand adequately

(10cii)
(i) Political institute's
(ii) Support organizations
(iii) Health services
(iv) Local schools
(v) Community development
================================
No. 1

*Agricultural Science Major: Areas of Specialization*

*1-*   Horticulture and Agronomy.Pre-Veterinary

 *2-*  Medicine and Animal Science.


*3-*  Equine Science.


4-  Agricultural Business.
*AGRIC*

(4ai)
-magnesium-
(i)Magnesium is also used by plants for the metabolism of carbohydrates
(ii)It is used in cell membrane stabilization.


(4aii)
-Manganese-
(i)It is used for nitrogen metabolism
(ii)For synthesis of some enzymes


(4aiii)
-Molybdenum-
(i)To convert nitrate into nitrite and then into ammonia.
(ii)It is also needed by symbiotic nitrogen fixing bacteria in legumes to fix atmospheric nitrogen.


(4b)
(i)Less water is lost in the process and there is no run-off.
(ii)Subsurface irrigation systems can free up aboveground space.
(iii)Crops grown in these conditions may grow more uniformly.
(iv)With less water remaining on the leaves, there is a lowered risk of excessive moisture damage.


(4ci)
-Overgrazing-
(i)Leads to erosion
(ii)Loss of soil nutrients


(4cii)
-Clean Clearing-
(i)Leads to erosion
(ii)Reduction of micro organisms activities


(4ciii)
-Bush Burning-
(i)It kills soil micro organisms
(ii)Leads to loss of soil nutrients.






*==============================*





(5ai)
Hybridization is the process of crossing two genetically different individuals to result in a third individual with a different, often preferred, set of traits.


(5aii)
Homozygous are individual organisms carrying two identical alleles (for example RR or rr) While heterozygous are  individual organisms that bear different alleles (for example Rr).


(5b)
(i)Reduction in farm output
(ii)Reduction in farmer's income for crop producers
(iii)Reduction of quality of crop
(iv)Increase in prices for consumers.
(v)More expenses to fight the disease.
(vi)It causes instability in food supply.


(5c)
(i)Good soil preparation.
(ii)Use of indigenous varieties.
(iii)Pest control through the use of mesh screen (nylon nets)
(iv)Roguing or Pruning
(v)Intercropping with aromatic herbs
(vi)Crop rotation and Multiple cropping
*AGRIC*


(8a)
[PICK ANY FOUR]
(i) Sanitation
(ii) Debeaking
(iii) Housing
(iv) Vaccination
(v) Feeding
(vi) Hatching
(vii) Incubation
(viii) Brooding
(ix) Candling
(x) Watering

(8bi)
Rinderpest:
(i) Quarantine and slaughter.
(ii) vaccination

(8bii)
Aspergillosis:
(i)Good hatchery sanitation
(ii) Avoidance of mouldy feed

(8biii)
Anthrax:
(i) Cut off infection source.
(ii) Dispose of anthrax carcasses correctly

(8biv)
Coccidiosis:
(i) Vaccination
(ii) Isolation of suspected animals

(8c)
(i) Poor growth
(ii) High competition for survival
(ii) It could lead to death of animal
(iv) It can lead to cannibalism

Today's NECO runz(commerce answers)

Always come back and refresh 


Commerce Obj*

1-10: ACAEDABDAC

11-20: EBEDEDCDBC

21-30: ADAABCDBAC

31-40: BADBEEEBCD

41-50: EAEECDECED

51-60: CBEBADEBBB

Completed

NUMBER  4]*


*[PICK FIVE]*

(i)Collection of Revenue
(ii)Supervision of Warehouse
(iii)Compilation of statistical Records
(iv)Prevention of smuggling
(v)Supervision of foreign Trade
(vi)Enforcement of Ban
(vii)Provision of Quarantine Facilities
(vii)Completion of Documents


*[PICK FIVE]*

(i)Collection of Revenue:- It assesses and collects Revenue from tariffs and excise duties

(ii)Supervision of Warehouse:-The customs department supervises bonded warehouse

(iii)Compilation of statistical Records:-The department compiles statistics on export andu import trade which are supplied to the government

(iv)Prevention of smuggling:-The custom authority prevents smuggling and sizes contraband goods

(v)Supervision of Foreign Trade:-The customs Department supervises foreign trade by ensuring that only licensed goods are imported or exported

(vi)Enforcement of Ban:-The customs department ensures that ban on prohibited goods are enforced

(vii)Provision of Quarantine Facilities:-Customs department provides appropriate quarantine facilities for the importation of livestock

(viii)Completion of Documents:-The customs department ensured that customs declaration forms and others documents are completed

: *(Number 8)*

(8a)
Commercialisation is a policy geared towards making state-owned enterprises to become more efficient and profit oriented. This policy makes it possible for public enterprises to become more viable and effective.

(8b)
*[ENUMERATE]*
(i)Efficient management
(ii)To generate more Revenue
(iii)Reduction in public expenditure and participation of private individual
(iv)Autonomy of enterprises and Removal of unproductive enterprises


*EXPLANATION*
(i)Efficient management:-Commercialization help government to develop a good and efficient management of public and private  enterprises

(ii)To generate more Revenue:-Commercialisation assist the government to  generate more Revenue


(iii)Reduction in public expenditure and participation of private individual:-Commercialisation help in reducing public expenditure on enterprise and also assist individuals to participate in economic activities through ownership of enterprises


(iv)Autonomy of enterprises and Removal of unproductive enterprises:-Commercialisation helps to provide autonomy for the government/private enterprises and also assist to remove or divest unproductive enterprises in the economy





.. PICK ANY 5

1. Finding the Best Distribution Channels
Distribution is about deciding how you'll get the goods or services you want to sell to the people who want to buy them. Having an idea for a product is great, but if you aren't able to get that product to the customers you aren't going to make money. Distribution can be as easy as setting up shop in the part of a city where your target customers are – but in an increasingly interconnected world, distribution more often than not now means that you'll need to take your products or services to the customers.

2. Financing an Enterprise
It takes money to make money. As a business owner, an important function of marketing a product is finding the money through investments, loans, or your personal capital to finance the creation and advertising of your goods or services.

3. Deep Market Research
Market research is about gathering information concerning your target customers. Who are the people you want to sell to? Why should they buy from you as opposed to a rival business? Answering these questions requires that you do some on-the-ground observation of the market trends and competing products.

4. Setting Prices
Setting the correct price for your product or service can be a challenge. If you price it too high, you might lose customers – but if you price it too low you might be robbing yourself of profits. The "right" price normally comes through trial and error and doing some market research.

5. Product and Service Management
Once you've determined the target market and set the price of your product or service, the goal becomes to effectively manage the product or service. This involves listening to customers, responding to their wants and needs, and keeping your products and services fresh and up to date.

6. Promotional Channels
Most business owners are familiar with the idea of promotion. Advertising your products and services is essential to attracting new customers and keeping existing customers coming back. As the marketplace changes, you'll want to respond appropriately by tailoring your promotion messages to social media, by sticking with more conventional outlets, or by using a mix of the old and new.

7. Matching Products to Customers
While we tend to think of selling and marketing as being closely linked, selling is last on the list of the seven functions of marketing. This is because selling can happen only after you've determined the wants and needs of your customer base and are able to respond with the right products at the right price point and time frame.


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Monday, 24 June 2019

NECO 2019 mathematics solutions

MATHS-OBJ!
1DBBCBDEDAC
11DCDAECDEDC
21CBAAECDCAD
31CCACCBDDCC
41CDDDCABDBA
51BCBDBCAADD

THEORY/ESSAY ANSWERS:

(1a)

At the end of year 1

Using; A = P(1 + R/100)N

A = #110,000(1+5/100)

A = #110,000(1.05)

Amount or savings = #115,500.00



At the beginning of year 2,

Principal, p = 115,500 + #50,000 = #165,500.00

At the end of year 2

A = #165,500(1+5/100)¹

A = #165,500 × 1.05

A = #173,775.00



At the beginning of year 3,

Principal, p = #173,775 + #50,000 = #223,775.00

At the end of year 3,

A = #223,775(1+5/100)

A = #223,775 × 1.05

A = 234,963.75



Total savings after 3 years = #234,963.75 + #50,000 = #284,963.75



(1b)

By end of third year

Savings is lesser than #300,000.00 by;

#300,000.00 - 284,963.75

=#15,036.25

= #15,036.25

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(9ai)

x+1⅔x≤ 2⅓x-1¼

x+5x/3≤ 7x/3 - 5/4

Multiply through with (12) 12x + 20x ≤ 28x - 15

32x ≤ 28x -15

32x - 28x ≤ -15

4x ≤ - 15

x ≤ - 15/4

x ≤ - 3¾.



(9aii)

4x-1/3 - 1+2x/5 ≤ 8+2x

Multiply through with (15) 5(4x-1)-3(1+2x)≤ 15(8+2x)

20x-5-3-6x ≤ 120 + 30x

14x-8 ≤ 120 + 8

-16x ≤ 128

x ≥ 128/-16

x ≥ -8



(9b)

Gradient

m=y²-y¹/x²-x¹

m=9-7/6-3

=⅔

Acute angle θ = Tan-¹ (⅔)

θ=Tan-¹ (0.6667)

θ=33.69degree.

=====================================



(5a)

x² - 5x - 24 = 0

x² - 5x = 24

x² - 5x + (5/2)² = 24 + (5/2)²

(x-5/2)² = 24 + 25/4

96 + 25/4

(x - 5/2)² = 121/4

x - 5/2 = ±√121/4

x - 5/2 = ± 11/2

x = 5/2 ± 11/2

x = 5/2 + 11/2 or 5/2 or 11/2

x = 16/2 or -6/2

x = 8 or -3



(5b)

S0/2 (3x²-4x+2)dx

= 3x²+¹/3 - 4x¹-¹/2 + 2x/1 + C

= 3x³/3 - 4x²/2 +2x/1 + C

= (x³ - 2x² + 2x + C) dx

= y = x³+¹/4 - 2x²+1/3 + 2x¹+¹/2 + C

= y = x⁴/4 - 2x³/3 + 2x²/2 + C

= y = x⁴/4 - 2x³/3 + 2x + C

=====================================

(11)

CLICK HERE FOR THE IMAGE

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(12a)

Tabulate



Score : 21-30, 31-40, 41-50, 51-60, 61-70, 71-80



Class mark(x) : 25.5, 35.5, 45.5, 55.5, 65.5, 75.5



f : 2,10,12,15,8,3



d(x- x̄): -20, -10, 0, 10, 20, 30



fd : -40, -100, 0, 150, 160, 90



Assumed mean = 45.5



(12b)

Using assumed mean ( x̄) = A.M + Σfd/Σf

x̄ = 45.5+260/50

x̄ = 45.5+5.2 = 50.7



(12c)

Semi inter quartile = Q2-Q7/2



Q3= 3/4 × f

= 3/4 × 50 =150/4 = 37.5



Q1= 1/4 × f

= 1/4 × 50/1 = 12.5



: . Semi inter quartile = 37.5 - 12.5/2 = 25/2

= 12.5

=====================================



(2a)

3^2x-y=1

3^2x-y=3^0

2x-y=0-------------(1)

16^x/4 = 8^3x-y

2^4x/2^2 = 2^3(3x-y)

2^4x-2 = 2^9x-3y

:. 4x-2 = 9x-3y

4x-9x+3y= 2

-5x+3y=2------------(2)

From equation (1):

2x-y=0

y=2x--------(3)

Substitute for y in equation (2)

-5x+3y=2

-5x+3(2x)=2

-5x+6x=2

x=2

Substitute for x in equation (3)

y=2x

y=2(2)=4

:.x=2, y=4



(2b)

x² - 4/3 + x+3/2

2(x² - 4) + 3(x +3)/ 6

2x² - 8 + 3x + 9/6

2x²+3x+1/6

(2x² + 2x)+(x+1)/6

2x(x+1) +1 (x+1)/6.

=====================================



(8ai)

Total surface area

= Total surface of cylinder + Curve surface of hemisphere

= (πr^2+2πrh) + (2πr^2)

= π(r^2 + 2rh) + π(2r^2)

= π[(r^2 + 2rh) + 2r^2]

= π[(7^2 + 2(7)(10) + 2(7)^2]

= π[(49+140) + 98]

= π(287)

= 287πcm^2



Using π=22/7

Total surface area =287×22/7 = 41×22

= 902cm^2



(8aii)

Volume = Volume of cylinder + volume of hemisphere

= πr2h + 2/3πr^3

= π[r^2h + 2/3r^3]

= π[(7^2)(10) + 2/3(7)^3]

= π(490 + 656/3)

= π(2156/3)

= 22/7 × 2156/3

= 22 × 308/3 = 6776/3

= 2258.67cm^3



(8b)

Perimeter of Arc = Φ/360 × 2πr

= 120/360 × 2 × 22/7 × 7

= 1/3 × 44 = 44/3

= 14.67cm

=====================================



(3)

CLICK HERE FOR THE IMAGE



Using SOHCAHTOA

|TM| / |MD| = Tan28°



298.5+1.5/|MD| = 0.5317

|MD| = 300/0.5317 = 564.2m



Similarly,

|TM| / |MC| = Tan34°

300/ |MC| = 0.6745

|MC| = 300/0.6745 = 444.8m



Distance between both , ΔCD

= 564.2 - 444.8

= 119.4m

=====================================



(10ai)

S=t^3 -3t -9t + 1

ds/dt=v

:. 3t^2 - 6t^2 -9



When v=0

3t^2 -6t^2 -9=0

(3t^2 -9t)+(3t-9)

3t(t-3)+3(t-3)=0

(3t+3)(t-3)=0

3t + 3=0

3t= -3

t= -3/3= -1 or t -3=0

t=3seconds



(10aii)

a=dv/dt = 3t^2 -6t -9= 6t -6

a=6t -6

When a=0

6t -6=0

6t=0+6

6t=6

t=6/6

t=1



(10b)

v=3t^2 -6t -9



When t=2seconds

v=3(2)^2 -6(2) -9

= 3*4-9-12-9= -9m/s

v= -9m/s



acceleration, a when t=2seconds



a=6t -6= 6(2) -6= 12-6

a=6m/s^2



(10c)

a=6t -6 = 36-6=30

a=30m/s^2

=====================================



(6a)

For X = a=4a , T6=256

ar^5=256

4ar^5/4=256/4

ar^5=64............(1)



For Y = a=3a, T5=48

ar^4=48

3ar^4/3=48/3

ar^4=16...............(2)



Divide equ (2) by (1):

ar^5/ar^4=64/16

r=4



Substitute for r in equ (2)

ar^4=16

a × 4^4=16

256a/256=16/256

a=1/16



(6ai)

First term of x : a=4a

a=4×1/16=1/4



(6aii)

Sn = a(r^n-1)/r-1

S4 = 1/4(4^4 -1)/4-1

=1/4(256-1)/3

=1/4 × 255/3

=85/4

S4=21.25



(6b)

y(4x+2)^-3



Let u =4x+2, y=u^-3

du/dx=4 , dy/du= -3u^-4



dy/dx=dy/du * du/dx



= -3u^-4 × 4

= -12u^-4

dy/dx= -12(4x+2)^-4



When x =1,

dy/dx= -12(4*1+2)^-4

= -12(4+2)

= -12 * 6^-4

= -12/6^4

= -12/1296

= -1/108

=====================================



(7a)

4x^2 - 9y^2 = 19

2x^2 x^2 - 3^2 y^2=19

(2x-3y)(2x+3y)=19



Substitute for 2x+3y=1

2x-3y=19............(1)

2x+3y=1..............(2)



Subtract equ (2) from (1)

2x-3y-(2x+3y)=19-1

3x-3y-2x-3y=18

-6y/-6=18/-6

y = -3



Substitute for y in equ (1)

2x-3(-3)=19

2x+9=19

2x/2=10/2

x=5



(7b)

Typing

=====================================



(4)

Mark: 1-5, 6-10, 11-15, 16-20, 21-25, 26-30



F : 6,4,5,5,6,4



x : 3,8,13,18,23,28



Fx: 18,32,65,90,138,112



x-x: -12.167, -7.167, -2.167, 2.833, 7.833, 12.833



(x-x)^2: 148.0359, 51.3659, 4.6959, 8.0259, 61.3559, 164.6859



f(x-x)^2: 888.2154, 205.4636, 23.4795, 40.1295, 368.1354, 658.7436



Mean(x) = Σfx/Σf = 455/30 =15.167



Variance = Σf(x-x)^2/Σf = 2184.167/30 = 72.8056

= 72.81(approx.)



Standard deviation = √Variance

= √72.84

= 8.533

= 8.53 (approx.)

=====================================

COMPLETED................
====================================

Wednesday, 15 May 2019

Waec 2019 expos ( Biology theory and Obj)

 Waec 2019 expos ( Biology theory and Obj)


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