SOLUTION: A cellular phone company offers a contract for which the cost C, in dollars, of t minutes given by C=0.25(t-600)+53.95, where ity is assumed that t>600 minutes. What times will kee

Question 286091: A cellular phone company offers a contract for which the cost C, in dollars, of t minutes given by C=0.25(t-600)+53.95, where ity is assumed that t>600 minutes. What times will keep costs between $93.45 and $131.20?
For the cost to be between $93.45 and $131.20, the telephoning time must be between ___ minutes and ___ minutes.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
plug in the lower limit of cost for C and solve for t
then do the same for then upper limit

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