Final answer:
Miguel's call will be rounded up to 24 minutes for billing purposes and at $0.30 per minute, his total telephone charges will be $7.20.
Step-by-step explanation:
To calculate Miguel's telephone charges for a call lasting 23.47 minutes, we must first recognize that the company charges for each minute or fraction thereof. This means that any part of a minute is treated as a full minute for billing purposes. Since Miguel spoke for 23.47 minutes, we will round up to 24 minutes.
The charge per minute is $0.30. Therefore, to find the total charge for Miguel's call, we multiply the number of minutes by the charge per minute:
Total charge = 24 minutes × $0.30 per minute
Total charge = $7.20
So, Miguel's charges for that phone call will be $7.20.