During low tide, the beachfront in some places is about 350 from the ocean to the homes . high tide can change the width of a beach at a rate of -17 feet each hour . it takes 6 hours for the ocean to move from low to high tide . what is the change in the width of the beachfront from low to high tide ?

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