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OpenStudy (anonymous):
\[r=2\sqrt{5L}\]the formula 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 70mph?
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OpenStudy (anonymous):
L=245 feet at 70 mph
OpenStudy (stormfire1):
\[70/2 = \sqrt{5L}\]\[35=\sqrt{5}\sqrt{L}\]\[35^{2}=5*L\]\[1225/5=L\]L=245ft.
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