300000000 would be a good number
unlike protein or fat, carbohydrates don`t have a R.D.I.
not more than 11mg.
a lot
Should be the same as adults.
About $400
none
120-130 pounds
An old person's life style is much more relaxed and quiet compared to that of a teenager. The typical teenager will always want to be doing something or having fun. They may also have much more responsiblity than an older person such as keeping up with relationships, friendships, chores, or a job.
It really depends on hard much you work out. If you work out all time you should eat a decent of carbs. If you are more of a couch potato you should eat minimal carbohydrates.
No more than 2,400 mg a day.
They should drink as much as their body tells them to. Your body has thirst sensors and they will tell the runner if they need to drink and how much.
A teenager should get about... maybe 1 hour the most. Thats what i think because then if you are on for a long time your eyes have an affect if its too long. Thats wat I have heard.