document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=691324>Question 691324</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What annual rate of interest compounded yearly  is required to double an investment in 4 years? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #426638 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=426638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What annual rate of interest compounded yearly is required to double an investment in 4 years?<BR>\n" );
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document.write( "A(t) = P(1+(r/n))^(nt)<BR>\n" );
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document.write( "Your problem requires that (1+(r/n))^(nt) = 2<BR>\n" );
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document.write( "(1 + (r/1))^(1*4) = 2<BR>\n" );
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document.write( "(1+r)^4 = 2<BR>\n" );
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document.write( "4*log(1+r) = log(2)<BR>\n" );
document.write( "log(1+r) = (1/4)*0.3010<BR>\n" );
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document.write( "log(1+r) = 0.0753<BR>\n" );
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document.write( "1+r = 10^0.0753<BR>\n" );
document.write( "1+r = 1.1892..<BR>\n" );
document.write( "rate = 0.1892.. = 18.92%<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
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