Find the area of a circular road sign with diameter of 42 cm

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.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

The area of a circle is equal to 1 dm². find the radius of the circle.