During the late 1800s, one result of railroad expansion in the west was
a. the decline of the western economy.
b. an increase in cattle ranching.
c. a decrease in metal mining.
d. the decline of the eastern economy.

What would a student most likely use if he or she wanted to consult a secondary source

Sailors went to special school to learn how to use the new technology that would them sail far distences. the school we know about was

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design