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October 24, 2014

Homework Help: Pre-Calculus-Trig

Posted by Chloe Mack on Sunday, January 30, 2011 at 7:44pm.

A lighthouse keeper 100 feet above the water sees a boat sailing in a straight line directly toward her. As watches, the angle of depression to the boat changes from 25 degrees to 40. How far has the boat traveled during this time?

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