Hello, all materials needed should be there. All error messages should be removed, I need help with my final study guide for my calc class. Your help is much appreciated.

9. (10 pts) Definite Integral: An animal population is increasing at a rate of f(t) = 200 + 50t per year where t is measured in years. By how much does the population increase between the fourth and the tenth years (by the end of the 10th year)? 10. (14 pts) Vocabulary: The cost function for a product is given to be C(x) = 3x2 - 5x +10 where x is the quantity produced in a day. a) Find the average cost function. b) Find the marginal cost function. c) If the product was sold for $4 a piece find the revenue function. d) Find the profit function. e) Find the marginal profit function