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November 26, 2014

Homework Help: calculus

Posted by Mr. goodstuff on Tuesday, January 17, 2012 at 11:53am.

A police cruiser, approaching a right ľangled intersection from the north is chasing a speeding car that has turned the corner and is now moving straight east. When the cruiser is 0.6 mi north of the intersection and the car 0.8 mi to the east, the police determine with radar that the distance between them and the car is increasing at 20 mph. If the cruiser is moving at 60mph at the instant of measurement, what is the speed of the car?

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