SOLUTION: A cellular phone company charges $50 for each phone plus $25 per month under a special sale plan. The total cost C (in dollars) of operating the phone is given by the linear model

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Question 337866: A cellular phone company charges $50 for each phone plus $25 per month under a special sale plan. The total cost C (in dollars) of operating the phone is given by the linear model C=50+25t where t represents the number of months of operation of a cellular phone.
How many months has the phone been in service if the total cost is $250.00?
What is the cost of the service after 18 months?
Thank You!!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
C=50+25t where t represents the number of months of operation of a cellular phone.
How many months has the phone been in service if the total cost is $250.00?
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Solve 50+25t = 250.00
25t = 200
t = 8
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What is the cost of the service after 18 months?
C(18) = 50+25*18 = $500
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Cheers,
Stan H.