document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=850203>Question 850203</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble with a compound interest problem;<BR>\n" );
document.write( "investment of 680 at 4 percent compounded monthly for 17 years.<BR>\n" );
document.write( "I tried the equation in my manual of A=P(1-r/n)^nt but I don't think I am using<BR>\n" );
document.write( "my calculator correctly, could anyone help give a break down so I could possibly<BR>\n" );
document.write( "see what I'm doing wrong? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #512015 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=512015\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How you put this into the calculator depends on the calculator type.  Graphing Calculator like TI-?? has parentheses available.  Even if on just simple calculator, or scientific calculator, you need to know order of operations and should have no trouble managing the computation.\r<BR>\n" );
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document.write( "If your formula is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cross%28A=P%281-r%2Fn%29%5Ent%29 ALIGN=MIDDLE  ALT=\"cross%28A=P%281-r%2Fn%29%5Ent%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > as shown, it is potentially wrong about the exponent \"nt\" in case the t becomes converted to just a factor(although the exponent appears correctly here); and the subtraction shown is not appropriate for exponential GROWTH.  This use of subtraction is the most likely problem happening in your exercise.\r<BR>\n" );
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document.write( "Compounding of interest for bank balance should be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=P%281%2Br%2Fn%29%5E%28nt%29 ALIGN=MIDDLE  ALT=\"A=P%281%2Br%2Fn%29%5E%28nt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where the r is the decimalized form of the yearly rate, and the n is the number of compounding periods in the year.  The number of years is t.\r<BR>\n" );
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document.write( "The value for A is then the expression, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28A=680%281%2B0.04%2F12%29%5E%2812%2A17%29%29 ALIGN=MIDDLE  ALT=\"highlight%28A=680%281%2B0.04%2F12%29%5E%2812%2A17%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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