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3 years ago

6

A submarine descends at a rate of 60 feet per minute. How long will it take to descend to a depth of 900 feet. ?

1 answer:

gregori [183]3 years ago

5 0

$Formula\ for\ veolocity:\\\\
velocity=\frac{distance}{time}\\
v=60\frac{feet}{min}\\
distance=900feet\\\\
velocity*time=distance\ \ |Divide\ by\ velocity\\
time=\frac{distance}{velocity}\\
time=\frac{900}{60}=15minute\\\\
\textbf{It\ will\ take\ 15\ minutes.}$

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And replacing we got:

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And we can assume a normal distribution and then we can solve the problem with the z score formula given by:

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