document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=147825>Question 147825</A>: <I><SPAN STYLE=\"word-break: break-all;\">  a cellular phone company offers a contract for which the cost of C, in dollars, of t minutes of telephoning is given by C=0.25(t-600)+ 55.95 where it is asumed that t>600 minutes.  What times will keep cost between $105.95 and $119.70?\r<BR>\n" );
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document.write( "For the cost to be between $105.95 and $119.70 the telephoning time must be between ?? minutes and ?? minutes.\r<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 #108269 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=108269\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve the cost equation for those two dollar amounts to find the corresponding times.<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.25%28t%5B1%5D-600%29%2B+55.95=105.95 ALIGN=MIDDLE  ALT=\"0.25%28t%5B1%5D-600%29%2B+55.95=105.95\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.25%28t%5B1%5D-600%29=50 ALIGN=MIDDLE  ALT=\"0.25%28t%5B1%5D-600%29=50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B1%5D-600=200 ALIGN=MIDDLE  ALT=\"t%5B1%5D-600=200\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B1%5D=800 ALIGN=MIDDLE  ALT=\"t%5B1%5D=800\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.25%28t%5B2%5D-600%29%2B+55.95=119.70 ALIGN=MIDDLE  ALT=\"0.25%28t%5B2%5D-600%29%2B+55.95=119.70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.25%28t%5B2%5D-600%29=63.75 ALIGN=MIDDLE  ALT=\"0.25%28t%5B2%5D-600%29=63.75\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B2%5D-600=255 ALIGN=MIDDLE  ALT=\"t%5B2%5D-600=255\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5B2%5D=855 ALIGN=MIDDLE  ALT=\"t%5B2%5D=855\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For the cost to be between $105.95 and $119.70 the telephoning time must be between <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28800%29 ALIGN=MIDDLE  ALT=\"highlight%28800%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > minutes and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28855%29 ALIGN=MIDDLE  ALT=\"highlight%28855%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > minutes. </SPAN>\n" );
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