document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=248223>Question 248223</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Man this one is a doozy it says, a cell phone company offers a contract for which the cost C, in dollars of t minutes of telephoning is given by C=0.25(t-600)+$61.95 where it is assumed t>600 minutes. What times will keep the cost between $110.45 and $134.70?<BR>\n" );
document.write( "? minutes and ? minutes<BR>\n" );
document.write( "Can someone please help? thanks so much </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #180918 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=180918\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Substitute C the  two dollar amounts<BR>\n" );
document.write( "and solve them<BR>\n" );
document.write( "C=0.25(t-600)+$61.95<BR>\n" );
document.write( "$110.45 and $134.70<BR>\n" );
document.write( "let l=low time<BR>\n" );
document.write( "and h=high time<BR>\n" );
document.write( "11045=0.25(l-600)+6195<BR>\n" );
document.write( "13470=0.25(h-600)+6195<BR>\n" );
document.write( "Now solve the two equations separately for l and h and those will be low and high times </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );