Which product is negative? a) −3⋅(−2)⋅(−4)⋅(−7) b) −6⋅(−7)⋅(−8)⋅0 c) −2⋅(−7)⋅12⋅(4) d) 4⋅(−9)⋅(−3)⋅(−1)

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