document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1005326>Question 1005326</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A principal earns 8.5% per year simple interest. How long will it take for the future value to quadruple?\r<BR>\n" );
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document.write( "t = years </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621623 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=621623\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> P=Po{1+0.085}^t<BR>\n" );
document.write( "P/Po=4<BR>\n" );
document.write( "4=(1.085)^t<BR>\n" );
document.write( "ln both sides<BR>\n" );
document.write( "1.3863=t ln (1.085)<BR>\n" );
document.write( "Without rounding, solve by dividing 1.3863/ln(1.085)<BR>\n" );
document.write( "t=17 years (16.993) </SPAN>\n" );
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