Answer:
Rest of question:
... equals marginal cost.
Firms will maximize profits at the point where marginal revenue equals marginal cost because producing after this point means that no profits will be made.
As long as the Marginal revenue exceeds marginal cost, there will be profits made because the company is making more than it is spending so they should keep producing. When it gets to a point in production where the marginal revenue equals marginal cost, the company should not produce further than that.
This is because, as earlier mentioned, any further production would result in the marginal cost being larger than the marginal revenue which means that a loss will be made. The company should therefore stop at the point where MR = MC so as not to let MC get larger than MR so that no losses will be made.
Answer
This citation is for a book on how to join the Federal Bureau of Investigation
Explanation
A Federal Bureau of Investigation (FBI) special agents work for the federal government and are responsible for conducting investigations according to the federal laws. The special agents are professionals responsible for analyzing a wide range of cases because investigators have skills in specific areas such as crime, accounting or engineering. Joining the secret service requires a person to obtain: a bachelor’s degree, gain work experience, complete the FBI application process, and go through the FBI Academy Training.
Solution:
Given Information,
Heat input is ( 
) = 5.5 × 
Btu/h
Combustion efficiency of the boiler (
) = 0.7
Combustion efficiency after turn up (
) = 0.8
Operation Hour (t) = 5200h
Unit cost (c) = 
Calculate heat output from the boiler 
= x
= 5.5 x x 0.7
= 3.85 x Btu/h
Calculate the heat input to the boiler after the tune-up
= / 
= 3.85 x / 0.8
= 4.8125 x Btu/h
Calculate the saved energy after the tune-up
= -
= 5.5 x - 4.8125 x Btu/h
= 0.6875 x Btu/h
Calculate the annual energy saving ( 
)
= x t
= ( 0.6875 x Btu/h ) ( 5200 hr/yr)
= 3575 x Btu/h
Calculate the annual cost saving
Annual cost saving = 
x Unit cost
= 3575 x Btu/h x
= 82225
