Answer:
Periodical
Explanation:
Definition of a Periodical: A newspaper or magazine published at regular intervals.
YES! The current schedule messes with teens sleep patterns. Teens get tired at 11pm. So if 1st period starts at 7am thats not enough sleep. Yet younger kids, (more awake in mornings) have later start times.
Within 50 feet from an aircraft would be 10 mph
