30points Work out for d (composite functions)

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.

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?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.