A Competitive Firm Produces Output Using Three Fixed Factors and One

Multiple Choice

A competitive firm produces output using three fixed factors and one variable factor.The firm's short-run production function is q = 305x - 2x², where x is the amount of variable factor used.The price of the output is $2 per unit and the price of the variable factor is $10 per unit.In the short run, how many units of x should the firm use?

A) 37
B) 150
C) 21
D) 75
E) None of the above.