Answer !

john's car is stopped at a red light. when the light changes, the car accelerates to 45 miles per hour in 15 seconds.
what is the approximate rate of change in the miles per hour that john's car accelerated?
a)
3 miles per hour per second
b)
12 miles per hour per second
c)
15 miles per hour per second
d)
30 miles per hour per second