document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=433080>Question 433080</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help! <BR>\n" );
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? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #300185 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=300185\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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<BR>\n" );
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document.write( "d = k(r^2)<BR>\n" );
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document.write( "Solve for \"k\" using \"a car traveling 60 mph can stop in 200 ft\".<BR>\n" );
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document.write( "200 = k(60)^2<BR>\n" );
document.write( "k = 200/3600 = 1/18<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "d = (1/18)r^2<BR>\n" );
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document.write( "How many feet will it take the same car to stop when it's traveling 70 mph?<BR>\n" );
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document.write( "d = (1/18)(70^2)<BR>\n" );
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document.write( "d = (1/18)4900<BR>\n" );
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document.write( "distance = 272.22 ft<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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