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
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 6 - Section 6.2 - More Angle Measures in the Circle - Exercises - Page 287: 28
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