A dolphin is seen swimming at the surface of the ocean. The dolphin dives to 35.25 feet below the surface and then jumps 15.5 feet above the water surface,

Part A

What is the difference, in feet, between the dolphins highest and lowest positions?

-35.25+15.5

Part B

What is the total distance that the dolphin travels from the surface of the ocean,

down to its lowest point, then up to its highest point?

-35.25+15.5=-19.75 is