Final answer:
Ms. F left her house at 7:56 am to reach the Wizarding World of Harry Potter by 9:12 am after a 1-hour-and-16-minute journey.
Step-by-step explanation:
To determine what time Ms. F left her house to arrive at the Wizarding World of Harry Potter by 9:12 am, we must subtract the duration of her trip from her arrival time.
Ms. F's journey took 1 hour and 16 minutes. We start by subtracting the minutes. If she arrived at 9:12 am:
- Subtract the 16 minutes from the 12 minutes of the hour, which requires borrowing an hour, making it 8:72 am.
- Then subtract the 16 minutes from 72 minutes to get 56 minutes. So now we have 8:56 am after subtracting just the minutes.
Next, subtract the 1 hour:
- Subtract 1 hour from 8:56 am, resulting in 7:56 am.
Therefore, Ms. F must have left her house at 7:56 am.