A street light is mounted at the top of a ls--tall pole. A man 6 feet tall walks away from the pole with a speed of 7 ft/s along a straight path. How fast (in /s) is the tip of his shadow moving when he is 40 feet from the pole? /s The altitude of a triangle is increasing at a rate of 1 cm/min while the area of the triangle is increasing at a rate of 2 cm2/min. At what rate is the base of the triangle changing when the altitude is 10 cm and the area is 160 cm? cm/min