What mountain range near the pacific coast still has active volcanoes?

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

On this map which states would the tropic of cancer run through

Xplain one benefit and one risk of making voting mandatory in the united states.