Answer:
9:00.
Explanation:
The field trip group arrived at the museum at a time that allows them to watch a 45-minute video about space and spend 2 and a half hours looking at the displays and exhibits. They left the museum at 12:15.
To find out the arrival time, we need to subtract the total time they spent in the museum (video + exhibits) from the departure time.
Let's break down the total time they spent in the museum:
- 45 minutes for watching the video about space
- 2 and a half hours for looking at the displays and exhibits
To calculate the total time, we need to convert 2 and a half hours to minutes. There are 60 minutes in an hour, so 2 and a half hours is equal to 2.5 * 60 = 150 minutes.
Now we can calculate the total time: 45 minutes (video) + 150 minutes (exhibits) = 195 minutes.
Next, we subtract the total time from the departure time:
12:15 - 195 minutes = 9:00
Therefore, the field trip group arrived at the museum at 9:00.