document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=614039>Question 614039</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sally is comparing Sprint to Verizon cell phone rates.  Sprint charges $25.00 per month plus and .10 per minute for the use of the phone.  Verizon charges $10.00 per month and .20 per minute for the use of the phone.  How long per month would Sally have to use her phone to make Sprint the better choice.\r<BR>\n" );
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document.write( "A.  51  minutes    B.  1 hour 57 minutes   C.  2 hours 31 minutes \r<BR>\n" );
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document.write( "D.  5 hours 51 minutes\r<BR>\n" );
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document.write( "Could someone please help me with this math problem? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #386432 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=386432\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sally is comparing Sprint to Verizon cell phone rates.<BR>\n" );
document.write( "Sprint charges $25.00 per month plus and .10 per minute for the use of the phone.<BR>\n" );
document.write( " Verizon charges $10.00 per month and .20 per minute for the use of the phone.<BR>\n" );
document.write( " How long per month would Sally have to use her phone to make Sprint the better choice.<BR>\n" );
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document.write( "Let m = no. minutes she uses in one month<BR>\n" );
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document.write( "Write an equation for the cost of each plan (per month)<BR>\n" );
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document.write( "Sprint<BR>\n" );
document.write( "cost = .10m + 25 <BR>\n" );
document.write( "Verizon<BR>\n" );
document.write( "cost = .20m + 10<BR>\n" );
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document.write( "Write an equation for the statement<BR>\n" );
document.write( "\"Verizon cost more than Sprint\"<BR>\n" );
document.write( ".20m + 10 > .10m + 25<BR>\n" );
document.write( ".20m - .10m > 25 - 10<BR>\n" );
document.write( ".10m > 15<BR>\n" );
document.write( "m > 15/.10<BR>\n" );
document.write( "m > 150 minutes<BR>\n" );
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document.write( "If she talks 151 min or more the Sprint plan is better<BR>\n" );
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document.write( "Prove this to yourself><BR>\n" );
document.write( "Sprint<BR>\n" );
document.write( " C = .10(151) + 25<BR>\n" );
document.write( " C = 15.10 + 25<BR>\n" );
document.write( " C = $40.10<BR>\n" );
document.write( "Verizon<BR>\n" );
document.write( " C = .20(151) + 25<BR>\n" );
document.write( " C = 30.20 + 10<BR>\n" );
document.write( " C = $40.30<BR>\n" );
document.write( " </SPAN>\n" );
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