An electric company charges $9.45 per month plus $0.28 per kilowatt-hour (kWh) for the first 200 kWh used per month and $0.04 per kWh for anything over 200 kWh
used.
a. How much is owed for using 130 kWh per month?
b. How much is owed for using 250 kWh per month?
c. Write a piecewise function, C(x), where C is the cost charged per month as a function of the monthly kilowatt-hours used, x.
d. Sketch the piecewise function.