document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37809>Question 37809</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the compound interest equation A= P(1 + r/n)^nt to find how long, to the nearest tenth of a year, it will take a $5000 investment to double if it is invested at 7% interest compounded quarterly. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23324 by </B><A HREF=/tutors/aboutme.mpl?userid=Alwayscheerful><B>Alwayscheerful(414)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alwayscheerful><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=23324\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In your compound interest formula,<BR>\n" );
document.write( "P is the principle (5000)<BR>\n" );
document.write( "r is the rate (.07)<BR>\n" );
document.write( "n is the number of times it compounds (4)<BR>\n" );
document.write( "t is the time (variable)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=P%281%2Br%2Fn%29%5Ent ALIGN=MIDDLE  ALT=\"A=P%281%2Br%2Fn%29%5Ent\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since you start out with $5000 and you want it to double, A will be $10,000.<BR>\n" );
document.write( "Now all you need to do is plug the numbers into the formula. \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10000=5000%281%2B%28.07%2F4%29%29%5E%284t%29 ALIGN=MIDDLE  ALT=\"10000=5000%281%2B%28.07%2F4%29%29%5E%284t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=%281%2B.0175%29%5E%284t%29 ALIGN=MIDDLE  ALT=\"2=%281%2B.0175%29%5E%284t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=1.0175%5E%284t%29 ALIGN=MIDDLE  ALT=\"2=1.0175%5E%284t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now to solve for t, you need to use logs. \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=log%282%29=log%281.0175%29%5E%284t%29 ALIGN=MIDDLE  ALT=\"log%282%29=log%281.0175%29%5E%284t%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%282%29%2Flog%281.0175%29=4t ALIGN=MIDDLE  ALT=\"log%282%29%2Flog%281.0175%29=4t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=39.9539818154=4t ALIGN=MIDDLE  ALT=\"39.9539818154=4t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=9.988495 ALIGN=MIDDLE  ALT=\"t=9.988495\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Round to the nearest tenth\r<BR>\n" );
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document.write( "Answer: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2810%29 ALIGN=MIDDLE  ALT=\"highlight%2810%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >years\r<BR>\n" );
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document.write( "Hope this helps! </SPAN>\n" );
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