myloorie
19.10.2021 •
Mathematics
The monthly cost C, in dollars, for calls from the United States to Japan on a certain
phone plan is modeled by the function
C(x) = 0.07 + 24.99
Where x is the number of minutes used and C is in dollars
a) What is the cost if you talk on the phone for 45 minutes?
b) Suppose that your monthly bill is $40, how many minutes did you use on the phone?
c) Suppose that your monthly budget only allows $50 on the phone. What is the
maximum number of minutes that you can talk?
d) Suppose D(x) models another phone plan that charges
D(x) = 0.14 + 10.99
Where x is the number of minutes used and C is in dollars
If you typically can only spend $50 a month for the phone, which plan C(x) or D(x)
would provide more minutes per month?
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