11.3.27 Question Help Y {I Consider the funcon x] = 5x2 - 5): - 4 and complete parts (a) through (c). {3] Find f{a + h); {'33 Find t: 1- I: - at); [1:] Find the instantaneous rate of change of f when a= T. [a] n + h) = [Simplify your answer. Do not factor.) Bus Econ 11.3.31 The revenue (in thousands of dollars) from producing x units of an item is modeled by R(x) = 5x - 0.001x. a. Find the average rate of change in revenue as x changes from 1002 to 1008. b. Find the marginal revenue at x = 4000. a. The average rate of change in revenue is dollars per unit. (Do not round until the final answer. Then round to the nearest dollar as needed.)