A spotlight on the ground is shining on a wall 20m away. If a woman 2m tall walks from the spotlight toward the building at a speed of 0.6m/s, how fast is the length of her shadow on the building decreasing when she is 2111 from the building? Answer (in meters per second): C] 1n(.7:) Consider the function an) = of an): A = B = For each of the following intervals, tell whether f'(m) is positive (type in l) or negative (type in ). (A, B): (B, 00): Thus we conclude that ay) has a local C] at B (type in MAX or MIN). 7 . For this function there are two important numbers A 0 Critical point: c = The function is: V ? on (0, c). Increasing on (c, co). DecreasingFind the critical point of the function x) = sin'1 a," 4m in the interval 0 0. wcoordinate of absolute maximum = C]