document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1147257>Question 1147257</A>: <I><SPAN STYLE=\"word-break: break-all;\"> To a police investigator, skid marks evidence is extremely important in determining how vehicles moved in a collision. Skid marks are the equivalent of fingerprints in a criminal investigation, and just as important. The speed a car was traveling can be calculated using the skid marks made as the car came to a stop. The formula for finding the speed of the vehicle is:\r<BR>\n" );
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document.write( "S equals square root of 30 times D times f times n end root\r<BR>\n" );
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document.write( "Where:\r<BR>\n" );
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document.write( "S = speed in miles per hour<BR>\n" );
document.write( "30 = a constant value used in the equation<BR>\n" );
document.write( "D = length of the skid marks in feet<BR>\n" );
document.write( "f = drag factor for the road surface<BR>\n" );
document.write( "n = braking efficiency as a percent\r<BR>\n" );
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document.write( "If a car’s speed is 70 miles per hour on a road surface with a drag factor of 0.50 and with a breaking efficiency of 85% (n = .85), what would be the length of the skid marks?  Round to the nearest tenth. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #768579 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52781)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=768579\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "The problems of School Math can be categorized in 2 categories.\r<BR>\n" );
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document.write( "Category 1 unites the problems where the student should think to get the solution.\r<BR>\n" );
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document.write( "Category 2, in opposite, does not require it.\r<BR>\n" );
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document.write( "Your problem belongs, obviously, to the second category.\r<BR>\n" );
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document.write( "You do not need think.\r<BR>\n" );
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document.write( "You only need substitute the given numbers into the given formula and use your calculator.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Happy calculations (!)\r<BR>\n" );
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document.write( "<H3>Making calculations is the students' honor duty and a privilege (!)<H3>\r<BR>\n" );
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document.write( " </SPAN>\n" );
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