May 22, 2015

Homework Help: Calculus-rates

Posted by Amy on Thursday, May 5, 2011 at 4:54am.

1.) A man 6 ft tall walks at a rate of 5 ft per sec. from a light that is 15 ft above the ground. At what rate is the top of his shadow changing?

2.) An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mph. Find the rate at which the angle of elevation is changing when the angle is at 60 degrees.

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