A British Thermal Unit (BTU) is defined as the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. Your family has a water heater that is rated for 30,000 BTUs and has a capacity of 500 pounds of water. What is the expected change in temperature of the water?
a. 140 F
b. 120 F
c. 90 F
d. 60 F
e. 30 F