Google Classroom Urpi was given this problem: The side b(t) of the base of a square prism is decreasing at a rate of 7 kilometers per minute and the height h(t) of the prism is increasing at a rate of 10 kilometers per minute. At a certain instant to, the base's side is 4 kilometers and the height is 9 kilometers. What is the rate of change of the surface area S(t) of the prism at that instant? Which equation should Urpi use to solve the problem? Choose 1 answer: A s (t ) = 6 16 ( t ) 1 2 s ( t ) = 16 ( t ) 1 3 c s(t) = 216(t) 12 + 46(t ) . h(t ) s(t) = [6(t) 12 . h(t)