document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1093676>Question 1093676</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sam put $2,000 in a savings account at his bank. After 10 years, his account balance was $4,000. The interest rate on the savings deposit is <BR>\n" );
document.write( "__%. (Hint: Use the rule of 70 to solve this problem.)<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 #708329 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=708329\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The rule of 70 is a way to estimate the number of years it takes for a certain variable to double. To estimate the number of years for a variable to double, take the number 70 and divide it by the growth rate of the variable.<BR>\n" );
document.write( "10=70/int\r<BR>\n" );
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document.write( "int=70/10=7 </SPAN>\n" );
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