Is anybody in economics in georgia connections academy

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

Federal courts have jurisdiction when a case involves what?

Spanish for "estate," this was a type of plantation or other economic activity in spain's "new world" colonies.