Question

Haley pays a monthly fee of $20 for her cell phone and then pays 5 cents per minute used. The cost of Haley’s cell phone bill can be expressed by the function C(m) = 0.05m + 20, where m is the number of minutes used. What are the domain and range of the function C(m)?

Answer 1

The domain of the function C(m) is all real numbers greater than or equal to zero, and the range is all real numbers greater than or equal to $20.

Step-by-step explanation:

The domain of the function C(m) = 0.05m + 20 represents the possible values for the number of minutes used, which can be any non-negative value.

Therefore, the domain is all real numbers greater than or equal to zero.

The range of the function C(m) represents the possible values for the cost of Haley's cell phone bill.

Since the cost will increase as the number of minutes used increases, the range is all real numbers greater than or equal to $20.

Answer 2

A

Step-by-step explanation:

domain: m ≥ 0

domain: C ≥ 20