a my Assignments *Search Resu... P Do HOI P Pearson MyL... Question 10, 7.2.45-BE HW Scor Part 1 of 2 O Points: 0 of The marginal revenue (in thousands of dollars) from the sale of x handheld gaming devices is given by the following function. WIN R'(x) = 4x (x2 + 27,000 (a) Find the total revenue function if the revenue from 130 devices is $21,660. (b) How many devices must be sold for a revenue of at least $50,000? . . . (a) The total revenue function is R(x) = , given that the revenue from 130 devices is $21,660. (Round to the nearest integer as needed.)