Two bird sit at the top of two different trees the distance between the first bird and a bird watcher on the ground 29.7 the distance between the bird watcher and the second bird is 42.1 feet what is the angle measure or angle of depression between this bird and bird watcher

The path traveled by a bottlenose dolphin as it jumps out of water is modeled by the equation y=-0.4+3x, where t is the height above water and x is the horizontal distance in feet. if a beam of light is shone upward at an angle modeled by the equation x+y=10, at what height from the waters surface will the beam of light hit the dolphin