As Shown in the Figure, a Laser Positioned on a Ship

As shown in the figure, a laser positioned on a ship is used to communicate with a small research submarine resting on the bottom of a lake. The laser is positioned 12 m above the surface of the water, and it strikes the water 20 m from the side of the ship. The water is 58 m deep and has an index of refraction of 1.33. How far horizontally is the submarine from the side of the ship? (Assume all numbers are accurate to three significant figures.)

A) 69 m
B) 49 m
C) 89 m
D) 59 m
E) 79 m

Correct Answer:

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