Solved: A cell phone plan has a basic charge of $35 a month. The plan includes 400 free
Chapter 1, Problem 58(choose chapter or problem)
A cell phone plan has a basic charge of $35 a month. The plan includes 400 free minutes and charges 10 cents for each additional minute of usage. Write the monthly cost C as a function of the number x of minutes used and graph C as a function of x for 0 < x < 600.
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