Which of the following statements demonstrates the associative property of multiplication? 4 · (3 · 6) = (4 · 3) · 6
6 · 4 = 4 · 6
-3 · 1 = -3
2(24) = 2(20 + 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