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OpenStudy (anonymous):
After a car accident, police can estimate the speed that a car was traveling by measuring the skid marks. The formula r=2√5L can be used, where r is the speed, in miles per hour, and L is the length of the skid marks, in feet. Estimate the speed of the car that left skid marks: a) 10 ft long b) 50 ft long c) 140 ft long
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