I need the answer to this question.

The price p (in dollars) and the demand x for a particular clock radio are related by the equation x = 3000 - 10p. (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 2000 clock radios. (D) Interpret R'(2700) = - 240.00. What is the domain of p(x)? O A. All real numbers OB. X20 O C. OsX 3000 O D. XS 4000 (B) R(X) = What is the domain of R(x)? OA. X20 OB. OSX s 3000 O C. OSX= 10 O D. x s 4000