(02.02 LC)

If f(x) is the total cost, in dollars, of x brownies, which of the following statements best describes the meaning of f(4) = 10?

a
The total cost of 2 brownies is $4.

b
The total cost of 4 brownies is $2.

c
The total cost of 4 brownies is $10.

d
The total cost of 10 brownies is $4.