document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1093370>Question 1093370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sarah invests $1000 in an account that earns 5.25% interest compounded annually. How long will it take the account to reach $2500? With that same time, what rate will take the account up to $5000? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #707991 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=707991\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i'll give you one (I'm human, need my sleep):<BR>\n" );
document.write( "2500 = 1000(1+0.0525)^t<BR>\n" );
document.write( "2500 = 1000(1.0525)^t<BR>\n" );
document.write( "2.5 = 1.0525^t<BR>\n" );
document.write( "log(2.5) = log(1.1525^t)<BR>\n" );
document.write( "log2.5 = (t)(log1.0525)<BR>\n" );
document.write( "log2.5/log1.0525 = t<BR>\n" );
document.write( "0.40/0.022 = t<BR>\n" );
document.write( "t = 18\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );