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October 24, 2014

Homework Help: physics

Posted by Anonymous on Tuesday, November 22, 2011 at 4:18pm.

The cost of gasoline per hour for running a certain car is directly proportional to the square of the speed. I f the cost is $2.40 per hour for a speed of 40 km/h, what is the cost per hour for a speed of 60 km/h?

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