A deep-sea exploring ship is pulling up a diver at the rate of 25 feet per minute The diver is 200 feet below sea level. How deep was the diver 10 minutes ago?

1 Answer
Lil Del
Nov 3, 2016

Ten minutes ago, the diver was #450# feet below sea level.

Explanation:

Since tge diver is being pulled up, measuring his movement for the past #10# minutes requires that we use #-25# for the movement over those #10# minutes. So, his depth #10# minutes ago is given by the expression

#-200 - 25(10)#
#-200 - 250#
#-450#

So, #10# minutes ago, the diver was #450# feet below sea level.

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