#### Answer

The ship is about 11 miles out at sea.

#### Work Step by Step

t$^2$=(4000$\frac{80}{5280}$)$^2$-4000$^2$
t$^2$$\approx$121.21
t$\approx$11

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The ship is about 11 miles out at sea.

t$^2$=(4000$\frac{80}{5280}$)$^2$-4000$^2$
t$^2$$\approx$121.21
t$\approx$11

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