document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=288017>Question 288017</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A marketing group developing online ad space is offering two payment options:\r<BR>\n" );
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document.write( "Option 1: $210 set up fee plus $10/inch of ad<BR>\n" );
document.write( "Option 2: No set up fee plus $25/inch of the ad\r<BR>\n" );
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document.write( "Let x = inches of proposed ad, for example, x=2 for a column ad that is 2\"\r<BR>\n" );
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document.write( "a) Write a mathematical model representing the total ad cost, C, in terms of x for the following\r<BR>\n" );
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document.write( "Option 1: C=__________<BR>\n" );
document.write( "Option 2: C=__________\r<BR>\n" );
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document.write( "I came up with the answer Option 1 being $14.00 and Option 2 being $15.00 is that correct???\r<BR>\n" );
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document.write( "Part b) How many of ad space would need to be purchased for option 1 to be less than option 2? Set up an inequality and show your work algebraically using the information in part a. Summarize your findings in a brief sentence. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208891 by </B><A HREF=/tutors/aboutme.mpl?userid=Deina><B>Deina(147)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Deina><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=Deina><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=208891\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You have the right(ish) answer, except you're not interpreting it correctly.<br>\r<BR>\n" );
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document.write( "<b>Option 1:</b> $210 set up fee plus $10/inch(x) of ad<BR>\n" );
document.write( "C = $210 + 10x <br><BR>\n" );
document.write( "<b>Option 2:</b> No set up fee plus $25/inch(x) of the ad<BR>\n" );
document.write( "C = 25x <br><BR>\n" );
document.write( "To locate the crossover point, where the two equal each other, we need to calculate where:<BR>\n" );
document.write( "Option 1 = Option 2, so: <br><BR>\n" );
document.write( "210 + 10x = 25x Now subtract 10x from each side, giving:<BR>\n" );
document.write( "210 = 15x<br> Divide each side by 15:<BR>\n" );
document.write( "210/15 = 15x/15 <br> giving us:<BR>\n" );
document.write( "14 = x <br>I'm guessing that you got here before, but now remember that \"x\" is <i>inches of ad space,</i> so at 14 ad inches the costs equal out. <b>Below</b> 14 inches Option 2 is less expensive. <b>Above</b> 14 inches Option 1 is less expensive, and bob's your uncle!<BR>\n" );
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