document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=760033>Question 760033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please help me answer this question? The wheels of a car have a radius 11inches and are rotating at 600 revolution per minute. Find the speed of the car in mi/hr. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #462379 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=462379\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The circumference of a circle can be calculated as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Aradius ALIGN=MIDDLE  ALT=\"2%2Api%2Aradius\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Using the approximation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi=3.14 ALIGN=MIDDLE  ALT=\"pi=3.14\"   DISABLED_style= \"max-width:90%; height:auto;\" >, the circumference of each of those wheels is calculated as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A3.14%2A11=69.08 ALIGN=MIDDLE  ALT=\"2%2A3.14%2A11=69.08\"   DISABLED_style= \"max-width:90%; height:auto;\" > inches.<BR>\n" );
document.write( "That is how much the car advances as the wheels turn one turn.<BR>\n" );
document.write( "In one minute, the wheels go through <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600 ALIGN=MIDDLE  ALT=\"600\"   DISABLED_style= \"max-width:90%; height:auto;\" > turns, so the car advances<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600%2A69.08=41448 ALIGN=MIDDLE  ALT=\"600%2A69.08=41448\"   DISABLED_style= \"max-width:90%; height:auto;\" > inches<BR>\n" );
document.write( "There are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12 ALIGN=MIDDLE  ALT=\"12\"   DISABLED_style= \"max-width:90%; height:auto;\" > inches in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > foot, so that is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=41448%2F12=3454 ALIGN=MIDDLE  ALT=\"41448%2F12=3454\"   DISABLED_style= \"max-width:90%; height:auto;\" > feet.<BR>\n" );
document.write( "There are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5280 ALIGN=MIDDLE  ALT=\"5280\"   DISABLED_style= \"max-width:90%; height:auto;\" > feet in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > mile, so that is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3454%2F5280 ALIGN=MIDDLE  ALT=\"3454%2F5280\"   DISABLED_style= \"max-width:90%; height:auto;\" >= approximately <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.6542 ALIGN=MIDDLE  ALT=\"0.6542\"   DISABLED_style= \"max-width:90%; height:auto;\" > miles.<BR>\n" );
document.write( "So, in one minute, the car advances <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.6542 ALIGN=MIDDLE  ALT=\"0.6542\"   DISABLED_style= \"max-width:90%; height:auto;\" > miles,<BR>\n" );
document.write( "and since there are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60 ALIGN=MIDDLE  ALT=\"60\"   DISABLED_style= \"max-width:90%; height:auto;\" > minutes in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > hour, the car's speed is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2A0.6542 ALIGN=MIDDLE  ALT=\"60%2A0.6542\"   DISABLED_style= \"max-width:90%; height:auto;\" > = approximately <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2839mph%29 ALIGN=MIDDLE  ALT=\"highlight%2839mph%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " <BR>\n" );
document.write( "Writing all the calculations together, we look so much smarter:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2A3.14%2A%2811inches%29%2F1turn%29%28600turns%2F1minute%29%281foot%2F12inches%29%281mile%2F5280feet%29%2860minutes%2F1hour%29=39.25%28mile%2Fhour%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > = approximately <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2839mph%29 ALIGN=MIDDLE  ALT=\"highlight%2839mph%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "If the teacher expects it, you can write it with the units, as above.<BR>\n" );
document.write( "Otherwise, you can write something like<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A3.14%2A11%2A600%2A60%2F12%2F5280=39.25 ALIGN=MIDDLE  ALT=\"2%2A3.14%2A11%2A600%2A60%2F12%2F5280=39.25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and you can enter all that into a calculator at once as:<BR>\n" );
document.write( "2 X 3.14 X 11 X 600 X 60 ÷ 12 ÷ 5280 = 39.25<BR>\n" );
document.write( "or as<BR>\n" );
document.write( "2 X 3.14 X 11 X 600 X 60 ÷ (12 X 5280) = 39.25 </SPAN>\n" );
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