3. The standard deviation for each year's data is given below. What do these values tell you about the data distribution? 20
2018 - 163.412
2019 - 178.039
2020 - 48.965

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