Question

In a certain city, the monthly cost of telephone service is given the function C = 0.10n + 18, where n is the number of calls, 10 cents is the cost per call, and $14 is a fixed charge. Find the cost of making 60 calls a month.

Answer 1

Answer:

The cost of making 60 calls a month is $20.

Step-by-step explanation:

There was a small typing mistake there. If the fixed charge is $14, the cost of n calls is given by the following equation:

$C(n) = 0.1n + 14$

Find the cost of making 60 calls a month.

This is C(60), that is, C when n = 60. So

$C(n) = 0.1n + 14$

$C(60) = 0.1*60 + 14 = 20$

The cost of making 60 calls a month is $20.