Consider the marginal cost function C'(x) = 0.09x ^2 -4x + 100

Consider the marginal cost function C' (x) = 0.09x2 - 4x + 100. a. Find the additional cost incurred in dollars when production is increased from 15 units to 20 units. b. If C(15) = 275, determine C(20) using your answer in (a). a. The additional cost incurred in dollars, when production is increased from 15 units to 20 units is approximately $ (Do not round until the final answer. Then round to two decimal places as needed.)