Question

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
Eliminate
C) 15 miles per hour per second
D) 30 miles per hour per second

Answer 1

Divide the 45 miles per hour by the 15 seconds and you get 3 miles per hour per second. So it’s A

Answer 2

C if I am not mistaken.