document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=808245>Question 808245</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function D(t)=12t^2-140t 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 180 feet.\r<BR>\n" );
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document.write( "The time to skid 180 feet is ____ seconds. (round to nearest tenth).\r<BR>\n" );
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document.write( "how would I set up the problem so I can get the right answer? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #486928 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=486928\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The function D(t)=12t^2-140t 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 180 feet.<BR>\n" );
document.write( "The time to skid 180 feet is ____ seconds. (round to nearest tenth). <BR>\n" );
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document.write( "This means D(t) = 180, therefore:<BR>\n" );
document.write( "12t^2 - 140t = 180<BR>\n" );
document.write( "12t^2 - 140t - 180 = 0<BR>\n" );
document.write( "simplify, divide by 4<BR>\n" );
document.write( "3t^2 - 35t - 45 = 0<BR>\n" );
document.write( "Using the quadratic formulat, I got a positive:<BR>\n" );
document.write( "t = 12.835 ~ 12.8 seconds </SPAN>\n" );
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