a. Find f (6000) and explain what it means.

b. What is the monthly charge if 9500 kWh are used?

a. Select the correct choice below and fill in the answer box to complete your choice.

(Simplify your answers. Type integers or decimals.)

A.

The charge for 6000 kWh is $nothing.

B.

The charge for nothing kWh is $6000.

b. The monthly charge is $nothing if 9500 kWh are used.

(Simplify your answer. Type an integer or a decimal.)