Final answer:
Charlie was out of his house for 13 hours and 24 minutes.
Step-by-step explanation:
To calculate how long Charlie was out of his house for, we need to subtract the time he left his house from the time he arrived back.
Given that Charlie left his house at 7.32 am and arrived back at 8.56 pm, we need to convert the time to a 24-hour format for easier calculation.
7.32 am can be written as 07:32 in 24-hour format, and 8.56 pm can be written as 20:56 in 24-hour format.
By subtracting 07:32 from 20:56, we get the difference in hours and minutes.
The difference is 13 hours and 24 minutes. Therefore, Charlie was out of his house for 13 hours and 24 minutes.