the price of stock in april (x= 1) price at 116, find the monthly average rate of change in price between June and September, June price is 87 and September price is 111

The phone company calculates a customerâ€™s monthly cell phone
bill as follows: monthly service charge: $30 voice charges: First 100 minutes: $0.014 per minute Second 100 minutes: $0.022 per minute Additional minutes: $0.037 per minute a. What
is the charge for a month in which 135 minutes were used? b. What is the charge
for a month in which 289 minutes were used? c. Construct a piecewise function
that gives the monthly charge for x minutes of usage.

Jan 5th, 2016

The phone company calculates a customerâ€™s monthly cell phone
bill as follows: monthly service charge: $30 voice charges: First 100 minutes: $0.014 per minute Second 100 minutes: $0.022 per minute Additional minutes: $0.037 per minute a. What
is the charge for a month in which 135 minutes were used? b. What is the charge
for a month in which 289 minutes were used? c. Construct a piecewise function
that gives the monthly charge for x minutes of usage.