Question

A scientist uses a submarine to study ocean life.
She begins 86 feet below sea level.
After traveling down for 3 seconds, she's 193 feet below sea level.

Find the rate of change in the submarine's elevation in feet per second. Round your answer to the nearest tenth.

find the change in depth
divide by 3 to get ft/sec
(your answer should be negative to show "below sea level" )

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