Question

Compute the monthly cost of the cellular phone for use of the following anytime minutes.

Answer 1

(a) $29.99

(b) $37.49

(c) $30.24

Explanation:

We have a function by part to calculate the monthly cost of a cell phone plan.

If the consumption is between 0 and 300 minutes, the value will always be $29.99. While if the consumption is greater than 300 minutes, the value is given by the following equation:

`C\mleft(x\mright)=0.25x-45.01`

Knowing the above, we calculate in each case:

(a) 190 minutes.

It is in the interval between 0 and 300 minutes, therefore, the cost is $29.99.

C (190) = $29.99

(b)

`\begin{gathered} C(330)=0.25\cdot330-45.01 \\ C(330)=82.5-45.01 \\ C(330)=37.49 \end{gathered}`

(c)

`\begin{gathered} C(301)=0.25\cdot301-45.01 \\ C(301)=75.25-45.01 \\ C(301)=30.24 \end{gathered}`