Rectangle defg has vertices d (2, 4), e (4, 7), f (10, 3), and g (8, 0). without graphing, determine the coordinates of d′, e′, f′, and g′ after rectangle defg has undergone the described transformation.
reflect about the y-axis

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