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May 29, 2015

Homework Help: calculus

Posted by cynthia on Tuesday, January 11, 2011 at 12:12pm.

An athlete is running around a circular track of radius 50 meters at the rate of 5 meters per second. A spectator is 200 meters from the center of the track. How fast is the distance between the two changing when the runner is approaching the spectator and the distance between them is 200 meters?

I don't what equations to use.

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