Find the center of dilation.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

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