Question 1 (1) When Q= 10, the formula TC =102+10 *10+1000 =/kloc-0.

AC = C(Q)/Q = Q+ 10+ 1000/Q = 10+ 10+ 100 = 120

(2)MC = dC/dQ = 2Q+ 10 = 2 * 100+ 10 = 2 10

Question 2 When P= 10, Q=500.

ed =-(dQ/Q)/(dP/P)=-(dQ/dP)*(P/Q)=(5+2P)*(P/Q)=(5+2 * 10)*( 10/500)= 0.5

Question 3 π = p * q-c = (20-3q) * q-(30+2q) =18q-3q2-30,

Find the extreme value by quadratic function or dπ/dQ= 18-6Q=0, so Q=6.