Help please this is major please and I need this done today

What is r i 4.5+10r=-6.5 with work pls

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

Find the measure of angle b in the following triangle