Question

A cell phone company has a basic monthly plan of $40 plus $0.45 for any minutes used over 700. If John was charged a total of $48.10, how many minutes must he have used during the month? Write your final answer in a complete sentence.

Answer 1

John must have used approximately 18 minutes over 700 during the month.

Step-by-step explanation:

To find out how many minutes John must have used during the month, we need to subtract the basic monthly plan of $40 from the total amount charged, which is $48.10. This will give us the additional cost for the minutes used over 700.

Additional cost = Total amount charged - Basic monthly plan
Additional cost = $48.10 - $40
Additional cost = $8.10

Next, we divide the additional cost by the cost per minute over 700, which is $0.45.

Minutes used over 700 = Additional cost / Cost per minute over 700
Minutes used over 700 = $8.10 / $0.45
Minutes used over 700 ≈ 18

Therefore, John must have used approximately 18 minutes over 700 during the month.