A fair six-sided die is rolled 54 times. How many times should a roll of "1" occur? OA. exactly 9 times
OB. about 18 times
OC. about 9 times
OD. exactly 18 times
help pls

Ineed with the quizzes in apex mathematics ii

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

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?