The demand function for a widget is given by p = 80+400/ln(x) where p is the price of the widget in dollars and x is the number of items in thousands of items and x > 1. Find the marginal revenue function.
The marginal revenue function is R'(x) = If 18 thousand items are currently begin made, by how much will the revenue change if we increase production by one thousand items? $ (round to 4 decimal places if rounding is needed)
