Answer:
C) $50,000,000
Explanation:
The aggregate rent is the surplus earned by the lawyers for operating over their cost at this market equilibrium.
In the picture attached, the rent is showed graphically.
At PL=$250 per hour, the amount of demanded hours is QL=1,000,000.
The oportunity cost at a zero hours level is PL(0)=$150.
The rent can be calculated as:

The aggregate rent is $50,000,000.
Answer:
cutting taxes by $125 billion
Explanation:
given data
economy = 0.8
expenditure gap = $100 billion
to find out
cutting taxes
solution
we get here cutting or reduce taxes that is express as
cutting taxes =
......................... 1
cutting taxes =
solve we get cutting taxes
cutting taxes = $125 billion
so cutting taxes by $125 billion
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
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Answer: B) cars and petrol