Algebra Homework

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A cellular phone plan had the following schedule of charges:

Basic service, including 100 minutes of calls: $20.00 per month

2nd 100 minutes of calls: $0.075 per minute

Additional minutes of calls: $0.10 per minute

(a) What is the charge for 200 minutes of calls in one month?

(b) What is the charge for 250 minutes of calls in one month?

(c) Construct a function that relates the monthly charge C for x minutes of calls.

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