Answer:
Explanation:
Average change in elevation means,
elevation in 1 minute.
Given,
the diver descended 42.56 feet in 11.2 minutes.
So, we have to find how many feet he dives in 1 minute.
Now,
In 1 minute he dives,
feet
=3.8
So, the average change in elevation is 3.8 feet per minute