Michael purchased a prepaid phone card for $35.00.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.

Question

C(x)=35.00-0.10x

How much credit is left on the card after Michael uses it for 50 minutes of calls?

Answer 1

To find how much credit is left on the card after 50 minutes of calls, we can substitute x = 50 into the function C(x) = 35.00 - 0.10x:

C(50) = 35.00 - 0.10(50)
C(50) = 35.00 - 5.00
C(50) = 30.00

Therefore, there will be $30.00 left on the card after Michael uses it for 50 minutes of calls.