Abank randomly surveyed 50 of its customers by mail to find out how customers use its mobile banking service. the survey found that only 11 of the 50 customers used the service. if the branch has 1,700 customers, about customers use the mobile banking service. ? ? ? ?

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