Mathematics, 25.10.2021 20:50, baby851

Chris purchased a prepaid phone card for $35.50. Calls cost 7 cents a minute using this card. The credit, C (in dollars), left on the card after it is used for x minutes of calls is given by the following function.
C(x) = 35.50 -0.07x

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Chris purchased a prepaid phone card for $35.50. Calls cost 7 cents a minute using this card. The cr...