A scuba diver dove from the surface of the ocean to an elevation of -79 9/10 feet at a rate of -18.8 feet per minute. After spending 12.75 minutes at that elevation, the diver ascended to an elevation of -28 9/10 feet. The total time for the dive so far was 19 1/8 minutes. What was the rate of change in the diver's elevation during the ascent?

Question

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Answer 1

descent time: 4.25 min
hover time: 12.75 min
19.125 - 4.25-12.75 = 2.125 min

So, the ascent rate was (-28.9 - (-79.9))ft/2.125min = 24.0 ft/min

Answer 2

a scuba diver dove from the surface of the ocean to an elevation of −99 9 10 feet at a rate of −30.7 feet per minute. After spending 10.75 minutes at that elevation, the diver ascended to an elevation of −18 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 3

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Answer 4

A scuba diver dove from the surface of the ocean to an elevation of −59
9
10
feet at a rate of −17.1 feet per minute. After spending 10.5 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.


The rate of change of the diver's elevation was
ft/min.