document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=387483>Question 387483</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student deposits $4,000 into a savings account with 7% continuously compounding interest.  How many years does he to wait before the balance has tripled? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273926 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=273926\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A student deposits $4,000 into a savings account with 7% continuously compounding interest. How many years does he to wait before the balance has tripled?<BR>\n" );
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document.write( "A(t) = Pe^(rt)<BR>\n" );
document.write( "3*4000 = 4000*e^(0.07t)<BR>\n" );
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document.write( "e^(0.07t) = 3<BR>\n" );
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document.write( "0.07t = ln3<BR>\n" );
document.write( "t = 15.69 years<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );