(1)假设某厂商的产量函数为q=9x^1/2,在短期，固定成本为1000美元，x为可变投入，其成本为40

（1)假设某厂商的产量函数为q=9x^1/2,在短期，固定成本为1000美元，x为可变投入，其成本为40

(1)假设某厂商的产量函数为q=9x^1/2,在短期，固定成本为1000美元，x为可变投入，其成本为4000美元/单位。生产q单位产品的总成本为多少？[即求出总成本函数C(q)]

(2)写出供给曲线方程。

(3)如果价格为1000美元，厂商产量为多少？利润水平为多少？在成本曲线图上表示出你的结论。

a. Suppose that a firm's production function is q=9x^1/2in the short nun, where there are fixed costs of $ 1000, and x is the variable input whose cost is S 4000 per unit. What is the total cost of producing a level o[ output q？ In other words, identify the total cost function C(q)？

b. Write down the equation for the supply curve.

e. If price is $ 1000, how many units will the firm produce？ What is the level of profit？ Illustrate your answer on a cost - curve graph.