document.write( "Question 339685: Hello' The stopping distance d of a car after the brakes are applied varies directly as the square speed r? if a car traveling 70 mph can stop in 270 feet how many feet will it take the same car to stop when it is traveling 80 mph? Thank you \n" ); document.write( "
Algebra.Com's Answer #243345 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
70^2/270=80^2/X
\n" ); document.write( "4,900/270=6,400/X CROSS MULTIPLY.
\n" ); document.write( "4,900X=270*6,400
\n" ); document.write( "4,900X=1,728,000
\n" ); document.write( "X=1.728,000/4,900
\n" ); document.write( "X=352.653 FT. ANS.
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