Which is the completely factored form of 4x2 + 28x + 49? (x + 7)(4x + 7) 4(x + 7)(x + 7) (2x + 7)(2x + 7) 2(x + 7)(x + 7)

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