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 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.
