molly’s opened a savings account to save for a bicycle. she deposited the same amount of money each week. at the end of 18 weeks, she has saved 331.56. how much money did molly deposit into her account each week.

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