Answer:
5.3 meters below water surface.
Step-by-step explanation:
We are told that the dolphin jumps to a height of 4.5 above water surface and her friend swims 9.8 directly below her.
To find out the position of the dolphin's friend relative to the surface of the water we will subtract dolphin's friends position from dolphin's position.
[tex]4.5-9.8=-5.3[/tex]
-5.3 means below the water surface. Therefore, position of dolphin's friend is 5.3 meters below water surface.