document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140177>Question 1140177</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How long does it take for $1425 to double if it is invested at 7.5% compounded continuously?  Round your answer to two decimal places, if necessary.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #760673 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=760673\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+F+=+Pe%5E%28rt%29+ ALIGN=MIDDLE  ALT=\"+F+=+Pe%5E%28rt%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "r = annual interest rate (as a decimal value)<BR>\n" );
document.write( "t = number of years<BR>\n" );
document.write( "P = present value<BR>\n" );
document.write( "F = future value<BR>\n" );
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document.write( "The problem can be solved without using $1450, as it is the same doubling time<BR>\n" );
document.write( "for any starting principal (the P's cancel):<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2P+=+Pe%5E%280.075t%29+ ALIGN=MIDDLE  ALT=\"+2P+=+Pe%5E%280.075t%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++ln%282%29+=+0.075t+ ALIGN=MIDDLE  ALT=\"++ln%282%29+=+0.075t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br>   <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++t+=+ln%282%29%2F0.075+ ALIGN=MIDDLE  ALT=\"++t+=+ln%282%29%2F0.075+\"   DISABLED_style= \"max-width:90%; height:auto;\" > or about <b>9.24</b> years (approx 9 years 3 months) </SPAN>\n" );
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