Mariana paid $6 for 5 pound of apples. how much will she pay for 3 pounds of apples? let x be the amount she will pay for 3 lbs. write an equation! the answer is 3.6.

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