Can someone please help me

The area of Europe is about 3 million square miles less than the area of South America. The area of Europe is about 4 million square miles. Write an equation with these quantities. Use s for the area of South America, in millions of square miles.

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