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The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

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