document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=534744>Question 534744</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The formule D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a vehicle traveling x miles per hour on dry pavement.\r<BR>\n" );
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document.write( "a. How fast can you drive if you wish to be able to stop your car within 65 feet?\r<BR>\n" );
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document.write( "b.On black ice, a truck's stopping distance is 3 times its stopping distance on dry pavement.  A truck traveling 20 miles per hour applies the brakes, on black ice, at a distance of 65 feet in front of a rubber traffic cone.  Will the truck hit the cone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #351631 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=351631\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The formule D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a vehicle traveling x miles per hour on dry pavement.<BR>\n" );
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document.write( "a. How fast can you drive if you wish to be able to stop your car within 65 feet?<BR>\n" );
document.write( "Solve: 0.054x^2+0.058x = 65<BR>\n" );
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document.write( "Graph to find \"x\":<BR>\n" );
document.write( "Ans: 34.16 mph<BR>\n" );
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document.write( "b.On black ice, a truck's stopping distance is 3 times its stopping distance on dry pavement. A truck traveling 20 miles per hour applies the brakes, on black ice, at a distance of 65 feet in front of a rubber traffic cone. Will the truck hit the cone?<BR>\n" );
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document.write( "Normal stopping distance:<BR>\n" );
document.write( "D(20) = 0.54*20^2+0.058*20 = 22.76 ft.<BR>\n" );
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document.write( "On black ice: 3*22.76 = 68.28 ft<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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