Question

The monthly charge in dollars for x kilowatt-hours (kWh) of electricity used by a residential consumer of an electric company from November through June is given by the function below.
C(x) =

20 + 0.188x if 0 ≤ x ≤ 100
38.80 + 0.15(x − 100) if 100 < x ≤ 500
98.80 + 0.40(x − 500) if x > 500
(a) What is the monthly charge if 1800 kWh of electricity is consumed in a month?

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MathCalculus

Functions

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