Given matrices s and t below, which statement is true? matrices s and t are not inverses of each other because s+t mc016-3.jpg i. matrices s and t are inverses of each other because st = ts = i. matrices s and t are inverses of each other because the determinant of s is 1. matrices s and t are not inverses of each other because the determinant of s equals the determinant of t.

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