Parental conset = NO
Parents are with you when oyu go see it = YES
You have to attend High School if you are of school age if you are a US citizen. If you are of another nationality you would have to have the relevant visa and parental consent if you are under 18.
Yes. In the United States, anyone under the age of 18 must have parental consent to submit their photos and information, to attend an open call or interview and when signing a modeling contract.
With the parent's consent, yes. However, the grandparents would need some type of legal custody otherwise they will not be able to do things like consent to the child's medical care, enroll the child in school (and the child must attend school), etc.
To legally drop out of school anywhere in the state of South Carolina, you have to be 17 years old. You have to attend school in South Carolina until age 17 regardless of parental consent.
Many states allow you to drop out at 16 with parental permission. Each state sets their own laws about mandatory education. In most, they require you to attend school until graduating from High School or age 18.
A 16-year-old is a minor and cannot leave home without parental consent or court approval (which school you attend and rather you have a job is irrelevant).
It is impossible to attend two schools
No it is not correct for a illegal alien to attend Princeton University. But can they? Whether its correct or not is matter of opinion.
A 15-year-old is a minor and therefore cannot move out of their home without parental consent. If your parents truly are refusing to let you go to school, then it needs to be reported, because in Iowa you HAVE to attend school until you're 16. Now, if they're homeschooling you, then you are attending school (although it might not be the school that you want to attend).
In Arizona, children between the ages of 6 and 16 must attend school, except under specific circumstances that are explained here: http://www.ade.az.gov/asd/dropout/azlaw.asp
Your parent[s] have the right to make this decision. If you want to attend a school that they did not give permission for you to attend you will need to see a judge and have them make the decision. Before you do that check your state and county law because in most places you go to school by district of residence, not by choice.
In Colorado, a 17 year old minor may dropout of high school. The only law about this is that a child aged 6 to 17 are required to attend school.