A basic cellular package costs $20/mo. for 60 min of calling, with an additional charge
Chapter 2, Problem 64(choose chapter or problem)
A basic cellular package costs $20/mo. for 60 min of calling, with an additional charge of $0.30/min beyond that time. The cost formula would be C = $20 + .30(x 60). If you have to keep your bill lower than $50, what is the maximum calling minutes you can use?
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