Question

A plane is beginning its descent to the ground. After 3

minutes, the plane is at an altitude of 31,275', and after 7
minutes it is at an altitude of 22,975'. At what rate, in feet
per minute, is the plane descending?

Answer 1

2075 ft/minute

Explanation:

31,275 - 22,975 = 8300, this is the decrease in altitude over 4 minutes.

By dividing the change in position by time you can find the rate of change.

8300/4

= 2075 ft/minute