Revenue Function for Sports Watches The demand function for a certain brand of sports watch is given by 40 (0 ≤ x ≤ 20) d(x) = 0.01x² + 1 where x (measured in units of a thousand) is the quantity demanded per week and d(x) is the unit price in dollars. (a) Find an expression for the revenue function R for the sports watch. Hint: R(x) = xd(x). R(x) = (b) Find R'(x). R'(X) = (c) Find R'(8), R'(10), and R'(12). (Round your answers to two decimal places.) R'(8) = R'(10) = R'(12) = Interpret your results.
