16. 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?
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5
Answer:
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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