document.write( "Question 433080: Please help!
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document.write( "The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 60 mph can stop in 200 ft, how many feet will it take the same car to stop when it's traveling 70 mph? \n" );
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Algebra.Com's Answer #300187 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 60 mph can stop in 200 ft, how many feet will it take the same car to stop when it's traveling 70 mph?\r \n" ); document.write( "\n" ); document.write( "--------------------- \n" ); document.write( "The distance is a function of the square of the speed. \n" ); document.write( "The speed increases by a ratio of 7/6, so the distance increases by (7/6)^2 \n" ); document.write( "200*(7/6)^2 = 272.222... feet \n" ); document.write( " \n" ); document.write( " |