The marginal revenue (in thousands of dollars) from the sale ofx handheld gaming devices is given by the following function. 2 R'(x) = 4x (x2 + 26,000) 3 (a) Find the total revenue function if the revenue from 115 devices is $53,863. (b) How many devices must be sold for a revenue of at least $49,000? E) (a) The total revenue function is R(x) = D, given that the revenue from 115 devices is $53,863. (Round to the nearest integer as needed.) Find the cost function for the marginal cost function. C'(x) = 0.06.2005"; xed cost is $9 <:> cm = D