Cheryl has 8 1/2 hours this weekend to work on her new video. She estimate it will take 2 1/4  hours to lip-synch the new song into 2 2/3 hours to learn the new dance steps. How much time will. she have left for her VTV interview?

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