Question

The elevation of an airplane changes by-420 feet in 12 seconds. What is the change in the airplane's elevation each second?

Answer 1

-35 feet per second

-420/12 = -35

Answer 2

-35 feet each second

Explanation:

Divide -420 by 12:

-420/12

= -35

So, the change in the plane' elevation is -35 feet each second