Which number line represents the solution to 5x ≥ 30?

What is the prime factorization of 230

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

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?