How many states are in the us

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. she randomly selects ten schools from the district and interviews all of the teachers at the selected schools. which type of sample did she use in this study? a)systematic sample b)probability sample c)stratified sample d)cluster sample

Did the writers of the declaration of independence accomplish their goals (did we get our independence and the new government we wrote about)?

According to thorstein veblen, a successful businessman would be most likely to demonstrate his worth to others by: