Which monomials are divisible by 9a^2b

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?

Consider the function below. which of the following functions could be the inverse of function f? pic below