document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1204790>Question 1204790</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The stopping distance s of a car varies directly as the square of its speed v. If a car traveling at 30 mph requires 45 ft to stop, find the stopping distance for a car traveling at 45 mph.<BR>\n" );
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document.write( "The ratio of speeds is 45:30 = 3:2.<br><BR>\n" );
document.write( "Since the stopping distance varies as the square of the speed, the ratio of stopping distances is 3^2:2^2 = 9:4.<br><BR>\n" );
document.write( "ANSWER: 45*(9/4) = 405/4 = 101.25 feet<br><BR>\n" );
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