document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1042085>Question 1042085</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function Upper D left parenthesis t right parenthesis equals 11 t squared minus 120 tD(t)=11t2&#8722;120t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170170 feet. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #656993 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=656993\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D(t)=11t2&#8722;120t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170 feet.<BR>\n" );
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document.write( "11t^2 - 120t - 170 = 0<BR>\n" );
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document.write( "Use the Quadratic Formula to get:<BR>\n" );
document.write( "t = [120 +- sqrt(120^2-4*11*-170)]/(22)<BR>\n" );
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document.write( "t = [120 +- sqrt(21880)]/22<BR>\n" );
document.write( "Positive solution::<BR>\n" );
document.write( "t = [120 + 147.92]/22<BR>\n" );
document.write( "t = 12.18 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "------------\r<BR>\n" );
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document.write( " </SPAN>\n" );
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