document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1054609>Question 1054609</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How would you solve the questions:\r<BR>\n" );
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document.write( "How long will it take for $1400 dollars to grow to $11,900 at an interest rate of 2.3% if the interested is compounded quarterly?  I am taking the amount and dividing it by the initial investment. My next step has been to plug the following into my TI 84 calculator:\r<BR>\n" );
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document.write( "log(1+.023)8.5\r<BR>\n" );
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document.write( "Can you tell me what I am doing wrong? I get 8.6 years but the correct answer should be 20.65 years. \r<BR>\n" );
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document.write( "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 #669804 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=669804\">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=+A+=+P%2A%28+1+%2B+r%2Fn+%29%5E%28n%2At%29+ ALIGN=MIDDLE  ALT=\"+A+=+P%2A%28+1+%2B+r%2Fn+%29%5E%28n%2At%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A+=+11900+ ALIGN=MIDDLE  ALT=\"+A+=+11900+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+P+=+1400+ ALIGN=MIDDLE  ALT=\"+P+=+1400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+r+=+.023+ ALIGN=MIDDLE  ALT=\"+r+=+.023+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+4+ ALIGN=MIDDLE  ALT=\"+n+=+4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > in yrs<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+11900+=+1400%2A%28+1+%2B+.023%2F4+%29%5E%28+4t+%29+ ALIGN=MIDDLE  ALT=\"+11900+=+1400%2A%28+1+%2B+.023%2F4+%29%5E%28+4t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+1+%2B+.023%2F4+%29%5E%284t%29+=+8.5+ ALIGN=MIDDLE  ALT=\"+%28+1+%2B+.023%2F4+%29%5E%284t%29+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+1+%2B+.00575+%29%5E%284t%29+=+8.5+ ALIGN=MIDDLE  ALT=\"+%28+1+%2B+.00575+%29%5E%284t%29+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.00575%5E%284t%29+=+8.5+ ALIGN=MIDDLE  ALT=\"+1.00575%5E%284t%29+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Take the log base 10 of both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%28+1.00575%5E%284t%29%29+=+log%28+8.5+%29+ ALIGN=MIDDLE  ALT=\"+log%28+1.00575%5E%284t%29%29+=+log%28+8.5+%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%28+1.00575%5E4+%29+%2B+log%28+1.00575+%29%5Et%29+=+log%28+8.5+%29+ ALIGN=MIDDLE  ALT=\"+log%28+1.00575%5E4+%29+%2B+log%28+1.00575+%29%5Et%29+=+log%28+8.5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A+log%28+1.00575+%29+%2B+t%2A+log%28+1.00575+%29+=+log%28+8.5+%29+ ALIGN=MIDDLE  ALT=\"+4%2A+log%28+1.00575+%29+%2B+t%2A+log%28+1.00575+%29+=+log%28+8.5+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4%2A.00249+%2B+.00249t+=+.92942+ ALIGN=MIDDLE  ALT=\"+4%2A.00249+%2B+.00249t+=+.92942+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.00249t+=+.92942+-+.00996+ ALIGN=MIDDLE  ALT=\"+.00249t+=+.92942+-+.00996+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.00249t+=+.91946+ ALIGN=MIDDLE  ALT=\"+.00249t+=+.91946+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+369.25+ ALIGN=MIDDLE  ALT=\"+t+=+369.25+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I get a huge number<BR>\n" );
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document.write( "20.65 yrs doesn't seem to work<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.00575%5E%284t%29+=+8.5+ ALIGN=MIDDLE  ALT=\"+1.00575%5E%284t%29+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.00575%5E82.6+=+8.5+ ALIGN=MIDDLE  ALT=\"+1.00575%5E82.6+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+1.6057+=+8.5+ ALIGN=MIDDLE  ALT=\"+1.6057+=+8.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ??<BR>\n" );
document.write( "Unless I messed up at the start<BR>\n" );
document.write( "Are you sure all the data is correct?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );