Consider the following revenue function, where R is measured in dollars. R = 82X 7 2.5x2 Find the marginal revenue, %. x dR . 7 = 82 5x dX I, Use differentials to approximate the change in revenue corresponding to an increase in sales of one unit when X = 15. (Round your answer in dollars to the nearest cent.) $|:lx Find the actual change in revenue corresponding to an increase in sales of one unit when x = 15. (Round your answer in dollars to the nearest cent.) $x Submit