Ascuba diver dove from the surface of the ocean to an elevation of
feet at a rate of
-18.6 feet per minute. after spending 14.5 minutes at that elevation, the diver ascended to
an elevation of -28 feet. the total time for the dive so far was 21 minutes. what was
the rate of change in the diver's elevation during the ascent? round your answer to the
nearest hundredth.
10