Question

A cell phone plan charges a flat monthly fee of $25 for the first 650 minutes, then $0.09 for each additional minute. A teenager's cell phone bill for last month came to $74.50. How many additional minutes did the teenager use?

Answer 1

The teenager did not use any additional minutes beyond the first 650 minutes covered by the flat fee.

Step-by-step explanation:

To calculate the number of additional minutes the teenager used, we need to determine the number of minutes covered by the flat fee and subtract it from the total bill.

The flat fee covers the first 650 minutes, so we subtract 650 from the total minutes used to get the additional minutes.

The total minutes used can be calculated by subtracting the flat fee ($25) from the bill total ($74.50) and then dividing the remaining amount by the price per minute ($0.09).

Using this formula, we can calculate:

1. Total minutes used = ($74.50 - $25) / $0.09
2. Total minutes used = $49.50 / $0.09
3. Total minutes used = 550 minutes
4. Additional minutes used = Total minutes used - 650
5. Additional minutes used = 550 - 650
6. Additional minutes used = -100 minutes

Since the result is negative, it means the teenager did not use any additional minutes beyond the first 650 minutes covered by the flat fee.