document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=359485>Question 359485</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help with this problem also.  <BR>\n" );
document.write( "Media services charges $30 for a phone and 20/month for its economy plan.  Find a model that determines the total cost c(t) of operating a media service phone for t months.C(t) = $50   ??? Is that correct?  Seems to easy\r<BR>\n" );
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document.write( "Use the model to find the total cost for 2 months of service<BR>\n" );
document.write( "Total cost  = $100   ???  Really seems to easy.\r<BR>\n" );
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document.write( "Please advise if it is correct.  Thank you.<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 #256518 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=256518\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The fixed cost is the cost of the phone, $30.  The variable cost is $20*t, where t is the number of months of operation.  The total cost is then fixed cost plus variable cost.  The total cost is then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28t%29=20t%2B30 ALIGN=MIDDLE  ALT=\"C%28t%29=20t%2B30\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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