document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=743001>Question 743001</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If I invested $2000.00 at the interest rate of 15%, compounded daily, for 52 weeks. How long would it take to reach $8000.00? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #452724 by </B><A HREF=/tutors/aboutme.mpl?userid=davethejackal><B>davethejackal(28)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=davethejackal><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=davethejackal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=452724\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let d = number of days\r<BR>\n" );
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document.write( "Assuming interest is 15% per annum and that there are 365.25 days in a year  then the interest every day = 15% / 365.25.\r<BR>\n" );
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document.write( "hence <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%282000%29+%281%2B.15%2F365.25%29%5Ed+=+8000+ ALIGN=MIDDLE  ALT=\"+%282000%29+%281%2B.15%2F365.25%29%5Ed+=+8000+\"   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%2B.15%2F365.25%29%5Ed+=+4.+ ALIGN=MIDDLE  ALT=\"+%281%2B.15%2F365.25%29%5Ed+=+4.+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Taking logs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+ln%281%2B.15%2F365.25%29d+=+ln%284000%29+ ALIGN=MIDDLE  ALT=\"+ln%281%2B.15%2F365.25%29d+=+ln%284000%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "hence <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+ln%284%29+%2F+ln%281%2B.15%2F365.25%29+ ALIGN=MIDDLE  ALT=\"+d+=+ln%284%29+%2F+ln%281%2B.15%2F365.25%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "d = 3376.3198690738941804021745971694 days = 9.243 years (4 sf, using 365.25 days/year).<BR>\n" );
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