document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=469699>Question 469699</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Word problems are so difficult for me to understand! Please help! Thanks.<BR>\n" );
document.write( "For an engine with a displacement of 2.8L, the function given by the equation d=Cn^-2 can be used to determine the diameter size of the carburetor's opening, d, in millimeters, where n is the number of rpm's at which the engive achieves peak performace and C is a constant.<BR>\n" );
document.write( "a. solve the equation for n.<BR>\n" );
document.write( "b. Suppose the carburetor's opening is 84 mm and rpm's are 4480. Find the value of C that makes the equation true.<BR>\n" );
document.write( "c. use the value of c that you found to determine the rpm's at which the engine produces peak power when the carburetor's opening is 81 mm. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #322223 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=322223\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+C%2An%5E%28-2%29+ ALIGN=MIDDLE  ALT=\"+d+=+C%2An%5E%28-2%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(a)<BR>\n" );
document.write( "Solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n ALIGN=MIDDLE  ALT=\"n\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Take the log of both sides<BR>\n" );
document.write( "using the rule:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28a%5Eb%29+=+b%2Alog%28a%29+ ALIGN=MIDDLE  ALT=\"+log%28a%5Eb%29+=+b%2Alog%28a%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28d%29+=+%28-2%29%2AC%2Alog%28n%29++ ALIGN=MIDDLE  ALT=\"+log%28d%29+=+%28-2%29%2AC%2Alog%28n%29++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28n%29+=+log%28d%29+%2F+%28-2%2AC%29+ ALIGN=MIDDLE  ALT=\"+log%28n%29+=+log%28d%29+%2F+%28-2%2AC%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now use the above rule in reverse<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28n%29+=+log%28d%5E%281%2F%28-2C%29%29+ ALIGN=MIDDLE  ALT=\"+log%28n%29+=+log%28d%5E%281%2F%28-2C%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use the rule:<BR>\n" );
document.write( "If <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28a%29+=+log%28b%29+ ALIGN=MIDDLE  ALT=\"+log%28a%29+=+log%28b%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+=+b+ ALIGN=MIDDLE  ALT=\"+a+=+b+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+d%5E%281%2F%28-2C%29%29+ ALIGN=MIDDLE  ALT=\"+n+=+d%5E%281%2F%28-2C%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "(b)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+84+ ALIGN=MIDDLE  ALT=\"+d+=+84+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+4480+ ALIGN=MIDDLE  ALT=\"+n+=+4480+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C ALIGN=MIDDLE  ALT=\"C\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+d%5E%281%2F%28-2C%29%29+ ALIGN=MIDDLE  ALT=\"+n+=+d%5E%281%2F%28-2C%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4480+=+84%5E%281%2F%28-2C%29%29+ ALIGN=MIDDLE  ALT=\"+4480+=+84%5E%281%2F%28-2C%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F%28-2C%29+=+x+ ALIGN=MIDDLE  ALT=\"+1%2F%28-2C%29+=+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+84%5Ex+=+4480+ ALIGN=MIDDLE  ALT=\"+84%5Ex+=+4480+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%2Alog%2884%29+=+log%284480%29+ ALIGN=MIDDLE  ALT=\"+x%2Alog%2884%29+=+log%284480%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+log%284480%29+%2F+log%2884%29+ ALIGN=MIDDLE  ALT=\"+x+=+log%284480%29+%2F+log%2884%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+3.6513+%2F+1.92428+ ALIGN=MIDDLE  ALT=\"+x+=+3.6513+%2F+1.92428+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+1.8975+ ALIGN=MIDDLE  ALT=\"+x+=+1.8975+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1%2F%28-2C%29+=+1.8975+ ALIGN=MIDDLE  ALT=\"+1%2F%28-2C%29+=+1.8975+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-2C+=+1%2F1.8975+ ALIGN=MIDDLE  ALT=\"+-2C+=+1%2F1.8975+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+-1%2F3.7950+ ALIGN=MIDDLE  ALT=\"+C+=+-1%2F3.7950+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+-.2635+ ALIGN=MIDDLE  ALT=\"+C+=+-.2635+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );