Arectangular room must have a maximum area of 84 square feet. if the room is to be 8 feet wide, what is the longest the room can be? . . 10.4. 10.5. 10.6. do i just multiply and if so its 10.5

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