document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=167301>Question 167301</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I hope you can help me.  I just went back to school and I am having so much trouble with the math (I had to start college in the \"stupid math\" class, and I'm STILL having trouble!).  Unfortunately my math professor is not very good at explaining things.  He's very nice, but he's very old, and when he's putting a problem on the board, he sometimes gets confused and gets the wrong answer, which then confuses me even more!  I need to know about unit multipliers.  How do you know which measurement goes where (top or bottom of fraction)?  I had a homework question (which I got wrong; I know the answer, but I still cannot find out how to get that answer.  \r<BR>\n" );
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document.write( "Convert 44 feet per second to miles per hour.  \r<BR>\n" );
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document.write( "The answer is 38 mph, but I have absolutely no idea how they came up with that answer.  I've been working on this problem for over an hour.  Thank you so much for your help.\r<BR>\n" );
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document.write( "DT </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #123223 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=123223\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the easiest way is to think about which unit is smaller or larger<BR>\n" );
document.write( "__ with fractional quantities (like ft/sec or dollars/gal), do the numerator and denominator seperately\r<BR>\n" );
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document.write( "miles are larger than feet, so there will be fewer for the same distance<BR>\n" );
document.write( "__ this means multiplying feet by a fraction LESS than one\r<BR>\n" );
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document.write( "the same is true for hours and seconds<BR>\n" );
document.write( "__ but in this case, the seconds are in the denominator<BR>\n" );
document.write( "__ so a smaller denominator means a larger fraction\r<BR>\n" );
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document.write( "44ft/sec __ there are 60 sec in a min, so you can go 60 times as far as in a sec<BR>\n" );
document.write( "__ 44ft/sec = 2640ft/min<BR>\n" );
document.write( "__ there are 60 min in an hr, so you can go 60 times as far as in a min<BR>\n" );
document.write( "__ 2640ft/sec = 158400ft/hr\r<BR>\n" );
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document.write( "there are 5280ft in a mi __ 158400ft/hr / 5280ft/mi = 30mi/hr\r<BR>\n" );
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document.write( "you can also use \"conversion factors\" incorporating units<BR>\n" );
document.write( "__ the units cancel like variables in multiplying fractions\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2844ft%2Fsec%29%2A%2860sec%2F1min%29%2A%2860min%2F1hr%29%2A%281mi%2F5280ft%29=30mi%2Fhr ALIGN=MIDDLE  ALT=\"%2844ft%2Fsec%29%2A%2860sec%2F1min%29%2A%2860min%2F1hr%29%2A%281mi%2F5280ft%29=30mi%2Fhr\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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