document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=834665>Question 834665</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the formulas s=0.04n+2500 gives an employees monthly salary s, in dollars, after selling n dollars in merchandise at an appliance store. <BR>\n" );
document.write( "a.) find the inverse of the function. Is the inverse a function?<BR>\n" );
document.write( "b) use the inverse to find the amount of merchandise sold if the employees salary was $2820 last month. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #503132 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=503132\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%28n%29=0.04n%2B2500 ALIGN=MIDDLE  ALT=\"s%28n%29=0.04n%2B2500\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Let i(n) be the inverse of s(n).\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%28i%28n%29%29=0.04%28i%28n%29%29%2B2500=n ALIGN=MIDDLE  ALT=\"s%28i%28n%29%29=0.04%28i%28n%29%29%2B2500=n\"   DISABLED_style= \"max-width:90%; height:auto;\" >;<BR>\n" );
document.write( "Solve for i(n).<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.04%2Ai%28n%29=n-2500 ALIGN=MIDDLE  ALT=\"0.04%2Ai%28n%29=n-2500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=i%28n%29=%28n-2500%29%2F0.04 ALIGN=MIDDLE  ALT=\"i%28n%29=%28n-2500%29%2F0.04\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The way this is asked, you are given s(n) and are asked to find n.  Use of i(n) seems inapplicable.  I'd start with just the original function, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%28n%29=2820=0.04n%2B2500 ALIGN=MIDDLE  ALT=\"s%28n%29=2820=0.04n%2B2500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and solve for n.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282820-2500%29%2F0.04 ALIGN=MIDDLE  ALT=\"%282820-2500%29%2F0.04\"   DISABLED_style= \"max-width:90%; height:auto;\" >, but this IS what was found to be the inverse expression.  s and n have appeared to switch purposes.  This amount of merchandise sales is 8000 dollars. </SPAN>\n" );
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