How did Rockefeller and Vanderbilt try to change the laws ?​

Which of these are examples of personal rights whose interpretation has changed over time? the right to bear arms the right to a speedy and public trial freedom of assembly the majority rules the common good

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

How many states were there when the constitution was written?