Please help! my gf will be mad if I don't finish soon

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?

If there were no system of checks and balance, the process of government would eventually fall apart. do you agree with this opinion? why or why not?

Recently, there has been pressure to loosen clean air standards. use economic arguments to support or oppose this proposed action.