When marginal revenue is equal to the marginal cost, then the firm should increase the level of production to maximize its profit.
Marginal revenue simply means the increase in revenue that a company makes as a result of selling an additional output of good. Marginal cost is the cost that a company incurs for production of one extra unit of good.
It should be noted that when the marginal cost if a firm is more than the marginal revenue, it means that the firm is producing too much. 
When the marginal revenue of the firm equals the marginal cost, then the firm should maximize its profit.
The correct option is A.
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Answer:
not just pay them they can award them with extra credit?
Explanation:
 
        
             
        
        
        
Answer:
There are no options listed, but what I can tell you for sure is that John's actions were both unethical and illegal. 
What John did is unethical because it is not moral and it goes against all the principles that guide professional conduct. John also did something illegal because he was an accomplice in committing fraud against the company. He knowingly benefited from the accountant's illegal actions, and that is basically the legal definition of an accomplice to a crime. 
 
        
             
        
        
        
Answer:
A). to track monthly changes in prices paid by urban consumers.
Explanation:
CPI(Consumer Price Index) is characterized as 'a statistical estimate of the price level of goods and services bought by consumers for consumption purposes by the households.' It primarily aims to estimate the change or swap in the prices of the weighted average price of the common basket(consumption goods, as well as, services that the consumers pay for). It is calculated using the formula;

where,
 = current Consumer Price Index
 = current Consumer Price Index
 = Current price basket
 = Current price basket 
 = Cost of price basket in the base year
 = Cost of price basket in the base year
It assists in deducing whether the average prices have received a fall or rise and determines inflation or deflation. Thus, <u>option A</u> is the correct answer.