The marginal revenue (in thousands of dollars) from the sale of x gadgets is given by the following function -2/3 R'(x)=4x(x+26,000) a Find the total revenue function if the revenue from 130 gadgets is $10,041. b. How many gadgets must be sold for a revenue of at least $40,000? a. The total revenue function is R(x) = b. gadgets must be sold to generate a revenue of at least $40,000. (Type a whole number.) given that the revenue from 130 gadgets is $10,041