Answer: 12 hours (noon)
Explanation:
**For simplicity's sake, we'll use military time (Zulu time).**
- It is 00:00 in North America.
- If one full rotation means a day has passed, or more specifically, that 24 hours have passed, then that means the Earth has rotated 360°.
- So if 360° = 24 hrs, then 180°, being 360/2, or half a rotation, will be 24/2 hrs, or 12 hours.
- So the time is now 12:00, or noon.