document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=201477>Question 201477</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-65.95), where it is assumed that t>=300 minutes.  What times will keep cost between $108.95 and $131.45?\r<BR>\n" );
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document.write( "For the cost to be between $108.95 and $131.45, the telephoning time must be between ___ minutes and ___ minutes. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #151744 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=151744\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> take your original equation of \r<BR>\n" );
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document.write( "c = .25 * (t - 65.95) and solve for t.\r<BR>\n" );
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document.write( "divide both sides by .25 to get\r<BR>\n" );
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document.write( "c/.25 = t - 65.95\r<BR>\n" );
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document.write( "add 65.95 to both sides of the equation to get\r<BR>\n" );
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document.write( "(c/.25) + 65.95 = t\r<BR>\n" );
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document.write( "just plug in the values for the low c and the high c and you get the time in minutes that would be minimum and maximum.\r<BR>\n" );
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document.write( "for the minimum, the equation becomes:\r<BR>\n" );
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document.write( "(108.95 / .25) + 65.95 = t\r<BR>\n" );
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document.write( "use parentheses to make sure the order of the arithmetic is clear.\r<BR>\n" );
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document.write( "simplify to get\r<BR>\n" );
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document.write( "435.8 + 65.95 = 5\r<BR>\n" );
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document.write( "simplify further to get\r<BR>\n" );
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document.write( "t = 501.75\r<BR>\n" );
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document.write( "that's your low number of minutes\r<BR>\n" );
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document.write( "solve the equation again using c = 131.45 to get the high end minutes.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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