Answer:
The equation of the new function is 
Step-by-step explanation:
Suppose we have a function f(x).
a*f(x), a > 1, is vertically stretching f(x) a units. Otherwise, if a < 1, we are vertically compressing f(x) by a units.
f(x - a) is shifting f(x) a units to the right.
f(x + a) is shifting f(x) a units to the left
In this question:

Vertically compressing by 1/2:
This is the same as multiplying the function by 1/2. So

The equation of the new function is 
Well, to get rid of them, you would have to add or subtract that fraction to both sides of the equation (making them still equal to each other), so it would just get too complicated to completely get rid of a fraction. That is, if you don't need to.
Answer: Heat rejected=150000MW
Heat rate= 2.5
Step-by-step explanation:
Thermal efficiency is defined as work out divided by heat in.
Therefore
thermal efficiency = 40/100= 100000 MW/Heat in
Heat in = 250000MW
For a closed system undergoing a cycle the change in internal energy is zero. Therefore the work out of the system is equal to the net heat transfer of the system. Therefore
Work out= heat in - heat out
Therefore heat out = heat in - work out
Heat out = 250000 MW - 100000MW = 150000 MW which is the amount of heat rejected
The heat rate is defined as the inverse of the thermal efficiency expressed in kJ/kWh.Therefore
Heat rate = 1/thermal efficiency
Heat rate = 1/0.4 = 2.5 kJ/kWh
I haven’t done this in a while, but I believe that the “of” in the equation means multiply so you do 3/4 x 1/3 to get 3/12 (simplified to 1/4)!!