From a balloon 905 feet high, the angle of depression to the ranger headquarters is 80°32'. How far is the headquarters from a point on the ground directly below the balloon (to the nearest foot)? O A. 151 ft о В. 156 ft О с. 141 ft O D. 146 ft о

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A: NOTE: Refresh your page if you can't see any equations. . take derivative the derivative is 

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Q: #37

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A: topic - indefinite integral

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A:

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A: Let's find. 

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A: As requested we can solve no 5 as below

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