On December 13, 1996 the Peoples Gas Company had the following rate schedule for natural gas usage in single family residences:
Monthly service charge 9.00
Per therm service charge
1st 50 Therm $.36375/therm
Over 50 Therms $.11445/therm
Gas charge $.3256/therm
a) Wha is the charge for using 50 therms in a month?
b)What is the charge for using 500 therms in a month?
c) construct a function that relates the monthy charge C for x therms of gas
d) Graph this function
Please help.. I've been at this andI havent gotten the answers the back of my book has given