Which statement is true about many of the amendments added to the US constitution after the Bill of Rights? A. They were written before the civil war
B. They changed the structure of the federal government
C. They extended rights of citizenship to new groups
D. They made it harder for people to vote

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

Lots of points: economics: the is the dollar value of all final goods and services produced within a country’s borders within a given year. a. gross domestic product b. business cycle c. inflation rate d. net exports

Experiment to investigate effect of medication on levels of stress in males and females. dependant variable?