The cost of manufacturing x toasters in one day is given
by
C(x) = 0.06 x^2 + 21 x + 310, \qquad 0 < x < 150.

(A) Find the average cost function\bar{C}(x) .

(A) Find the average cost function

(B) List all the critical values of

(C) Use interval notation to indicate where

** Note: ** Use 'INF' for

Increasing:

(D) Use interval notation to indicate where

Decreasing:

(E) List the

(F) List the

You can earn partial credit on this problem.