Consider sample data with xbar =10 and S=2 compute the coefficient variation

How do you work out 21.3-8= show your working. plz

What does the first stage of a multistage rocket do?

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.