To find out how fast a tree grows, you can measure its trunk. a giant red oak's diameter was 248 inches in 1965. the tree's diameter had grown to 251 inches in 2005. find the average rate of change in the diameter of the tree per year.

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