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Mathematics 13 Online
OpenStudy (anonymous):

The formula r=2sqrt(5L) can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 80 mph?

OpenStudy (amistre64):

80 = 2 sqrt(5l) 40 = sqrt(5l) 1600 = 5l 320 = l if i see it right

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