Find the surface area of each figure

Polynomial that can be factored as (3x-4)(3x+4)

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

What is the following sum in simplest form? square root 8 + 3 square root 2 + square root 32