Suppose the total monetary benefits received from building a flood control dam in Mililani were given by the equation benefit = 250,000H – 2500H^2, where H is the height of the dam in feet and ^n means raised to the power n. And suppose the costs of building such a dam were given by the equation cost = 200,000H + 625H^2, where H is again the height of the dam in feet . How tall a dam is optimal from an economic standpoint? a. 5 feet b. 8 feet c. 25 feet d. 50 feet