If Cade shoots 318 free throw baskets in 4 hours, about how many can he shoot in 7 hours?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.