The area a if a circle is pi times the radius r squared

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122