The revenue equation(in hunderds of millions ofdollars) for barley production in a certain country is approximated by R(x)=0.0672x^2 + 1.1293x + 2.4393 where x is in hundreds of millions of bushels. Find themarginal-revenue equation and use it to find the marginal revenue for the production of the given number of bushels.

(a) Themarginal-revenue equation is R(x)= ___

(Round to four decimal places asneeded.)

(b) Find the marginal revenue for the production of 100,000,000 bushels.

The marginal revenue is ___ hundred million dollars.

(Integer or Decimal rounded to two decimal places asneeded.)

(c) Find the marginal revenue for the production of 950,000,000 bushels.

The marginal revenue is ___ hundred million dollars.

(Integer or decimal rounded to two decimal places asneeded.)