Arectangle is dilated by a factor of 1/5. the area of the new rectangle is 4 square yards . what could be the dismension of the original rectangle

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