2) (a) The side of a cube increases at a rate of 1/2 m/sec. Find the rate at which the volume of the cube increases when the side of the cube is 4 m. Yol of Cube S343 = 64m = = 64 (2) = 32 m/sec (b) A girl flies a kite at a height of 300ft and assume at that instant there is no vertical rate of change. The wind then carries the kite horizontally away from her at a rate of 25 ft/sec. How fast must she let out the string when the kite is 500 ft away from her (not the horizontal distance)?