Aruptured oil tanker causes a circular oil slick on the surface of the ocean. a. pay close attention to the units in this problem. when the radius of the oil slick is 170 meters, the radius is expanding by 0.4 meter/minute. (b) suppose we also know that the thickness of the oil slick remains uniform and the volume of oil spilled remains fixed. at the time referred to in part (a), the thickness of the oil slick is 0.03 meters. how fast is the thickness of the oil slick decreasing? convert your answer to millimeters per second. (recall: 1 m = 1000 mm)