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Mathematics, 02.10.2021 07:00 khynia11

Ravi purchased a prepaid phone card for $15.00. Calls cost 10 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) = 15.00 -0.10%
How much credit is left on the card after Ravi uses it for 30 minutes of calls?

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Ravi purchased a prepaid phone card for $15.00. Calls cost 10 cents a minute using this card. The cr...
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