Answer
a) C(0) = 30 dollars ; If you use 0 gigabytes, it costs you 30 dollars.
b) C(5) = 30 dollars ; If you use 5 gigabytes, it costs you 30 dollars.
c) C(15) = 90 dollars ; If you use 15 gigabytes, it costs you 90 dollars.
d) Domain of C = {x :0 ≤ g ≤ 60} ; There are at most 60 gigabytes used in a day.
e) After the initial period, the graph becomes linear.
Work Step by Step
see above.
