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Mathematics 21 Online
OpenStudy (anonymous):

a person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed the angle of depression to the boat is 18°33'. When the boat stops, the angle of depression is 15°33'. The lighthouse is 200 ft tall. How far did the boat travel when it was first noticed until it stopped? Round the answer to the hundredths place.

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