DETAILS TANAPMATH7 9.3.034. The total cost C(x) (in dollars) incurred by Aloha Company in manufacturing x surfboards a day is given by the following function. C(x) = -14x2 + 500x + 100 where (0 s x $ 15) (a) Find C'(x). C' (x) = (b) What is the rate of change of the total cost (in dollars) when the level of production is 10 surfboards a day? per surfboard Submit