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Which of the following functions represents a cell phone bill if there is a monthly charge of 20 dollars plus 6 cents for each minute of use?

A) f(x) = 20 + 6x)
B) f(x) = 20.06x
C) f(x) = 20 + 0.06x

User Dick
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1 Answer

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Letter C represents a flat rate of $20 + .06x per each minute.
User Gvasquez
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