Most of article i, section 8 of the constitution describes what kind of congressional powers?

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

What would happen to the tides if there was no moon and no sun in the sky?

U. s. foreign aid incudes all the following programs excepta. humanitarian aidb. military assistancec. cycle of dependency grantsd. development aid