document.write( "Question 467838: 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( "
Algebra.Com's Answer #321192 by ankor@dixie-net.com(22740)\"\" \"About 
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The formula r=2sqrt(5l) can be used to approximate the speed r, in miles per
\n" ); document.write( " hour, of a car that has left skid marks of length l, in feet.
\n" ); document.write( " How far will a car skid at 60 mph?
\n" ); document.write( ":
\n" ); document.write( "Write it:
\n" ); document.write( "\"2sqrt%285L%29\" = 60
\n" ); document.write( "divide both sides by 2
\n" ); document.write( "\"sqrt%285L%29\" = 30
\n" ); document.write( "square both sides
\n" ); document.write( "5L = 30^2
\n" ); document.write( "5L = 900
\n" ); document.write( "L = \"900%2F5\"
\n" ); document.write( "L = 180 ft skid marks
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check on a calc: enter 2*\"sqrt%285%2A180%29\"
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