How can you tell that a fraction is a unit fraction? (can't any fraction be a unit fraction? )

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

The product of sin 30 degrees and sin 60 degrees is same as the product of

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}