Translate the question into a mathematical expression. The quotient of two and a number times seven

What is the quotient of 42/3 divided by 4 1/5

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?

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