Suppose that q(t) is the rate at which the temperature of an oven increases in degrees Celsius per minute. What does the statement ∫[20 to 0] q(t) dt = 120 mean?
a) The total increase in temperature over 20 minutes is 120 degrees Celsius.
b) The total decrease in temperature over 20 minutes is 120 degrees Celsius.
c) The rate of temperature increase is 120 degrees Celsius per minute.
d) The rate of temperature increase is 6 degrees Celsius per minute.