Suppose a profit-maximizing, price-taking firm had a total cost function given by: TC=10+Q+0.1Q^2

11. Calculate the breakeven price (price at which the firm makes profit =0). _____________$3.00

12. Calculate the profit-maximizing quantity when price is $5.00. __________________ 20 units

13. Calculate the short-run shut down price for the firm. _________________ $1.00

answers given, please show work without graphs