Finding equivalent ratios given the total quantity

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

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Explain how the quotient of powers was used to simplify this expression.