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Mathematics 20 Online
OpenStudy (anonymous):

a telephone company offers a monthly cellular phone plan for $24.99 it includes 350 anytime mins plus$0.25 per minute additional. the following function is used to compute the monthly cost for a subscriber where x is the number of anytime mins used. C(x)= {24.99 {0.25x-62.51 if 0350 compute the monthly cost of the cell phone for use of the following anytime mins a.220 b.400 c.351

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