look at the description

Question

A scuba diver dove from the surface of the ocean to an elevation of −49 9/10 feet at a rate of −15.4 feet per minute. After spending 10 minutes at that elevation, the diver ascended to an elevation of −28 9/10 feet. The total time for the dive so far was 17 1/8 minutes. What was the rate of change in the diver's elevation during the ascent? Round your answer to the nearest hundredth.

Answer 1

 

 (-49.9- 0 )/-15.4 feet per minute = 3.24 min

 

 17.125 - (3.24+10) =  3.885 min is the time of ascent

 

(-49.9 - -28.9) = -49.9 + 28.9 = 21

 

21/3.885 = 5.405