After a rupture, oil begins to escape from an underwater well. If, as the oil rises, it forms a circular slick whose radius increases at a rate of 0.42 ft/min, find the rate at which the area of the spill is increasing when the radius is 130 ft. Let 'a' denote the radius and 't' denote the time. Use decimal notation and give your answer to three decimal places. Recall: A = πr²
