Calculate the area of a circle with radius of 6m

Which expression is not a polynomial?

Acircle has a circumference of 28.36 units what is the diameter of the circle

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.