SOLUTION: a cellular phone company offers a contract for which the cost of C, in dollars, of t minutes of telephoning is given by C=0.25(t-600)+ 55.95 where it is asumed that t>600 minutes.

Question 147825: a cellular phone company offers a contract for which the cost of C, in dollars, of t minutes of telephoning is given by C=0.25(t-600)+ 55.95 where it is asumed that t>600 minutes. What times will keep cost between $105.95 and $119.70?
For the cost to be between $105.95 and $119.70 the telephoning time must be between ?? minutes and ?? minutes.

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Solve the cost equation for those two dollar amounts to find the corresponding times.
1.

For the cost to be between $105.95 and $119.70 the telephoning time must be between minutes and minutes.
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