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A spherical balloon is being deflated at the rate of 80 square centimeter per minute. At what rate is the radius decreasing when the radius is 8 cm? O -0.999 cm/min O -0,099 cm/min O 0.999 cm/min O 0.099 em/min A man 180 cm tall is walking away from a street light 6.1 meters high at a rate of 120 cm/s. Find the rate at which the length of his shadow is changing. O 50.03 cm/'s O 75.23 cm/s O 50.23 cmis O 25.23 cm/s