Which of the following represents a geometric sequence? a) 1/4, 1/4, 1/4, 1/4 b) 1/4, 1/5, 1/6, 1/7 c) 1/4, 1, -4, 16 d) 1/4, -4, 1/4, -4

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