Josh, lisa, and vicki each ate 1/4 of their own pizza.. each pizza was the same size, but josh ate 1 slice , lisa ate 2 slices and vicki ate 3 slices .. how is that possible

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations