The price p (in dollars) and the demand x for a particular clock radio are related by the equation x = 4000 - 20p (A) Express the price p in terms of the demand x, and find the domain of this function. (B) Find the revenue R(x) from the sale of x clock radios. What is the domain of R? (C) Find the marginal revenue at a production level of 3100 clock radios. (D) Interpret R'(3800) = - 180.00 (A) p=p(x) = What is the domain of p(x)? O A. OsX s 4000 O B. x s 5000 O C. X20 O D. All real numbers (B) R(X) = What is the domain of R(x)? O A. Osx s 4000 O B. x20 C. x s 5000 O D. Osx 20 (C) The marginal revenue at a production level of 3100 clock radios is s (Round to the nearest cent as needed )