37) a cellular phone plan had the following schedule of charges: basic service, including 100 minutes of calls 2nd 100 minutes of calls additional minutes of calls $20.00 per month $0.575 per minute $0.10 per minute what is the charge for 200 minutes of calls in one month? what is the charge for 250 minutes of calls in one month? construct a function that relates the monthly charge c for x minutes of calls.