There are known to be teenagers who have reached over 400 pounds. Although a few teenagers CAN carry this weight, it is certainly unhealthy, as well as limiting one's lifespan.
13 or 18? depends on state laws.
Well, "teenager" varies from those legally considered children to those legally considered adults, and specifics are missing. If you're referring to carrying a handgun, typically, no. However, an adult teenager may carry a gun for say, hunting, or something to that effect. A child may do the same, provided they have adult supervision.
6
It depends on the Teenager. Some are very mature and some have alot of growing up to do.
30
a lot
Should be the same as adults.
$ 3.00
as much as he wants
not more than 11mg.
As much as their body can handle
About $400