February 20, 2017

Homework Help: calculus

Posted by becca on Tuesday, January 17, 2012 at 12:29am.

An airplane flying west at 300 miles per hour goes over the control tower at noon, and a second airplane at the same altitude, flying north at 400 miles per hour, goes over the tower an hour later. How fast is the distance between the airplanes changing at 2:00 P.M.?

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