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 October 16th, 2009, 07:01 PM #1 Newbie   Joined: Oct 2009 Posts: 2 Thanks: 0 please help me to solve this a computer service firm charges $98 per month for an on-site maintenance contract. if no maintenance contract is in place, the firm charges$432 for an on-site visit. how many call-outs per year would make the maintenance contract worthwhile? by the way, i see a chart labels its y axis with "100's of surveys". what does this mean? thanks in advance
 October 16th, 2009, 11:33 PM #2 Senior Member   Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 3 Re: please help me to solve this We have: 98 per month for service. How much would this be per year? 432 per callout. If there are n callouts per year, how much does it cost (in terms of n) for a year? We want (cost per year with service) ? (cost per year without service) Solve for n. Since you can't have "part of a callout", you will probably need to round up. "100s of surveys" is exactly what it says. The y axis has some labels, probably 1, 2, 3, etc. And you are supposed to multiply that by 100, and that's the number of surveys.
 October 18th, 2009, 02:06 AM #3 Newbie   Joined: Oct 2009 Posts: 2 Thanks: 0 Re: please help me to solve this thanks so much for helping me

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### A computer service firm charges 98 per month for an on-site maintenance contract . If no maintenance contract is in place, the firm charges 432 for an on-site visit. How many call-outs per year would make the maintenance contract worthwhile?

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