Answer: The dock (D) is at 2 1/4 feet above water. Put letter D at the 2 1/4 line. the hook (H) underwater is 1.5 (or 1 1/2 feet) under water. Put letter H at the negative 1.5 (or negative 1 1/2 line). the total distance between the dock and the hook underwater is 3 3/4 (or 3.75) feet.
