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April 19, 2014

Homework Help: Calculus

Posted by Reonea on Sunday, October 30, 2011 at 7:30pm.

A hot air balloon rising vertically is tracked by an observer located 3 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is pi/5 , and it is changing at a rate of 0.1 rad/min. How fast is the balloon rising at this moment?

______ miles/min

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