Alejandro weighs 37 pounds and sits on a seasaw 2 feet away from its center. if his brother marco sits on the seasaw 3 feet away from the center and the seasaw is balanced, how many pounds does marco weigh? if necessary, round your answer to the nearest tenth of a pound.
a. set up a proportion.
b. solve, showing your work, and write your answer in a complete sentence to answer the question being asked (rounding appropriately).