Question

A scuba diver's vertical position in relation to the surface of the water changes by -90 ft in 3 min. What is the average change in the diver's vertical position each minute?

Answer 1

-90 / 3 = -30 ft per minute <==

Answer 2

I believe the answer to this -30 ft a min. if you take -90 and divide it by 3 you get -30. I hope this helps you out.:)