document.write( "Question 467477: 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 60 mph?
\n" ); document.write( "The car will skid _____ feet.
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Algebra.Com's Answer #320864 by kelsiesmurf(9)\"\" \"About 
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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 60 mph?
\n" ); document.write( "The car will skid _____ feet.\r
\n" ); document.write( "\n" ); document.write( "\"60=2sqrt%285L%29\" divide both sides by 2
\n" ); document.write( "\"30=sqrt%285L%29\" square both sides
\n" ); document.write( "\"900=5L\" divide both sides by 5
\n" ); document.write( "\"180=L\"\r
\n" ); document.write( "\n" ); document.write( "To check:
\n" ); document.write( "\"2sqrt%285%2A180%29\"
\n" ); document.write( "\"2sqrt%28900%29\"
\n" ); document.write( "\"2%2A30\"
\n" ); document.write( "60
\n" ); document.write( "
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