Mariah had owed her grandfather $2.25 but was recently able to pay him back $1.50. how much does mariah currently owe her grandfather.

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