van purchased a DVD player on sale. The original selling price was $175.90. The sale price was $150.75. What is the first step in finding the percent markdown? Find the percent markdown.

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