3problem22

(1 point) Suppose that the revenue from selling x washing machines is r(x) = 30000 1 dollars. X Find the marginal revenue when 400 machines are produced. Marginal revenue is Use the function r' (x) to estimate the increase in revenue that will result from increasing production from 400 machines a week to 401 machines a week. Revenue will increase by approximately Find the limit of r' (x) as x - co. Think about what this number means in the context of this problem. Limit is