Find the determinant of the following 3x3 matrix
2 -3
2 —3 1
2 0 -1
1 4 5​

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