I need help with angle sums! Anyone know how to do this! Plz help! I need help

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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

Plzz ! need the answer asap! 7% of 980