document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=29185>Question 29185</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a bank returns $25,000 with compounded interest, how long was the money left in the bank? rate of 8%. How do I use logarithms to find the answer? I have tried to use my textbook for help but I still do not understand. Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15992 by </B><A HREF=/tutors/aboutme.mpl?userid=atif.muhammad><B>atif.muhammad(135)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=atif.muhammad><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=15992\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This question cannot be solved without knowing how much money there was originally in the bank.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" > * <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.08%29%5Ey ALIGN=MIDDLE  ALT=\"%281.08%29%5Ey\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 25000\r<BR>\n" );
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document.write( "where x = amount of money at the start, y=number of years the money was there.\r<BR>\n" );
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document.write( "x= 20000 (according to your reply!)\r<BR>\n" );
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document.write( "20000 * <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.08%29%5Ey ALIGN=MIDDLE  ALT=\"%281.08%29%5Ey\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 25000\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.08%29%5Ey ALIGN=MIDDLE  ALT=\"%281.08%29%5Ey\"   DISABLED_style= \"max-width:90%; height:auto;\" >  = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25000%2F20000 ALIGN=MIDDLE  ALT=\"25000%2F20000\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.08%29%5Ey ALIGN=MIDDLE  ALT=\"%281.08%29%5Ey\"   DISABLED_style= \"max-width:90%; height:auto;\" >  = 1.25\r<BR>\n" );
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document.write( "This calls for us to use the 3rd Logarithmic Law. <BR>\n" );
document.write( "If you need to know which one I'm talking about, then consult this website:<BR>\n" );
document.write( "http://www.themathpage.com/aPreCalc/logarithms.htm#laws\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281.08%29%5Ey ALIGN=MIDDLE  ALT=\"%281.08%29%5Ey\"   DISABLED_style= \"max-width:90%; height:auto;\" >  = 1.25\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%2A+log+%281.08%29 ALIGN=MIDDLE  ALT=\"y%2A+log+%281.08%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log+1.25 ALIGN=MIDDLE  ALT=\"+log+1.25\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28log+1.25%29+%2F+%28log+1.08%29 ALIGN=MIDDLE  ALT=\"%28log+1.25%29+%2F+%28log+1.08%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "y = 2.899435195 years \r<BR>\n" );
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document.write( "We will round off the number of years to the nearest whole number. However, your textbook may not so use my answer below with caution.\r<BR>\n" );
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document.write( "y = 3yrs. The money was there for 3 years. </SPAN>\n" );
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