document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=40903>Question 40903</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help...here is my question and the start to my answer...please help\r<BR>\n" );
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document.write( "(Q) Two cars with new tires are driven at an average speed of 60 mph for a test drive of 2000 miles. The diameter of the wheels of one car is 15 inches. The diameter of the wheels of the other car is 16 inches. If the tires are equally durable and differ only by diameter, which car will probably need new tires first? Why? \r<BR>\n" );
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document.write( "(A) The formula for circumference is 2 * pi * radius ( or pi * diameter)<BR>\n" );
document.write( "So the circumference for the 16 in tire would be 16*pi = 50.26<BR>\n" );
document.write( "The circumference of the 16 in. tire is : 16 * pi = 50.26<BR>\n" );
document.write( "In 2000  miles, the 16 in. tire has rotated 2000/50.26 = 39.79 times<BR>\n" );
document.write( "So, the 16 in. tire has done more work.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #26289 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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=26289\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2000 miles = x inches<BR>\n" );
document.write( "126,720,000 inches<BR>\n" );
document.write( "First car's tire:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C+=+2%28pi%29r ALIGN=MIDDLE  ALT=\"C+=+2%28pi%29r\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C+=+%28pi%2915 ALIGN=MIDDLE  ALT=\"C+=+%28pi%2915\"   DISABLED_style= \"max-width:90%; height:auto;\" > is about 47.12<BR>\n" );
document.write( "126,720,000/47.12 = about 2,689,303 rotations<BR>\n" );
document.write( "Second car's tire:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C+=+2%28pi%29r ALIGN=MIDDLE  ALT=\"C+=+2%28pi%29r\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C+=+%28pi%2916 ALIGN=MIDDLE  ALT=\"C+=+%28pi%2916\"   DISABLED_style= \"max-width:90%; height:auto;\" > is about 50.27<BR>\n" );
document.write( "126,720,000/50.27 = about 2,520,787 rotations<BR>\n" );
document.write( "The first car's tire rotates more, so there is probably more 'ware and tare'. </SPAN>\n" );
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