Which of the following is the formula in solving the area of a circle? a. A= 2πr
b. A= πr2
c. A= πd
d. A=2 πr2

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

You have 3 boxes, one "strawberries"; one "mentos" and one "mixed".but you know that all the labels are in incorrect order .how do you know witch is witch?