Oil Spill In calm waters, the oil spiliing from the ruptured hull [If a grounded tanker forms an oii slick that is circular in shape. If the radius r of the circle is increasing at the rate of 20 \"0 : / ftg'min t min after the rupture occurs, nd an expression for the radius at any time t. Hint: (\"(0) = O. fit) = ft How large is the polluted area 40 min after the rupture occurred? : The Customkey Company determines that the marginal cost of producing sterling silver key fobs is given by 10x MC(X) = 0