Aperson came to work at 8: 30 am, went out at 11: 45 am, had lunch, came in at 12: 30 pm, and left work at 5: 15 pm. the total number of hours worked by this person was

Evaluate the following expression 1/3^2

Can someone me and plz do the problem

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