Question

How much will it cost Tom if he used his cell phone for 860 minutes in one month? Tom's basic cell phone plan charges $79.99 for service plus $0.22 per minute beyond the included 800 minutes in the plan.

Answer 1

Determine the time for which Tom used his cell phone beyond the 800 minutes.

`860-800=60`

Determine the charge for additional 60 minutes with taking 0.22 for one minute.

`60\cdot0.22=13.2`

The additional charge is $13.2.

The basic cell phone charge is $79.99.

Determine the total cost to Tom for using cell phone for 860 minutes.

`\begin{gathered} C=79.99+13.2 \\ =93.19 \end{gathered}`

So total cost to Tom for the cell phone is $93.19.