What substance inside of an air conditioner allows the transfer of het? How do the man find it

A cold liquid refrigerant absorbs heat from the hotter room in the evaporator, cooling the room down. The refrigerant then changes phase to a gas and is put through a compressor to increase its temperature. Refrigerant then passes through the condenser coils, transferring heat from the refrigerant to the outside air.

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.