7. which is the best buy? 6 shirts for $25.50 4 shirts for $18.00 5 shirts for $21

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g