A waterfall is n times the height of its picture on a postcard. Which equation represents the height, y, of the waterfall if the
picture is 7 cm tall?
A y = 7n
By = 7+n
y=n-7
y = 7n

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