How far apart are hash marks in high school football?

How far are the bottom of the numbers from the sideline?

How far are the top of the numbers from the sideline?

How many players must the offense have on the line of scrimmage prior to each play?

All offensive linemen must wear numbers...

A defensive player cannot be called for pass interference on an uncatchable ball thrown to a receiver.

A high school receiver must get two feet in bounds for a legal catch.

If a defensive player jumps into the neutral zone before the ball is snapped, he can legally get back before the ball is snapped.

Where is the ball marked for next play when a ball carrier goes out of bounds?