Desalination is the most expensive way of delivering spring water.
ocean water.
rainwater.
freshwater.

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

22. the effect of threshold braking is to a. cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Did cuneiform develop the language we use today