The revenue equation (in hundreds of millions of dollars) for barley production in a certain country is approximated by R(x)=0.0673x +1.2883x+2.2308 where x is in

The revenue equation (in hundreds of millions of dollars) for barley production in a certain country is approximated by R(x)=0.0673x² +1.2883x+2.2308 where x is in hundreds of millions of bushels. Find the marginal-revenue equation and use it to find the marginal revenue for the production of the given number of bushels.(a) The marginal-revenue equation is R'(x) =(Round to four decimal places as needed.)