Approximately how many cases does the California court system handle annually?

"Students who use mental imagery to study for an exam will do the same as those who do not." This sentence is an example of

a. a research idea. b. a research problem. c. a scientific hypothesis. d. a null hypothesis.

Cartograms use things such as ______ rather than space to represent areas on a map.

a. topography b. population c. colors d. textures