Refer to the cost regression for Straker Industries shown below.
Straker Industries estimated its short-run costs using a U-shaped average variable cost function of the form

A V C = a + b Q + c Q ^ { 2 }

and obtained the following results. Total fixed cost (TFC) at Straker Industries is $1,000.

\begin{array} { r l l l l l } \text { DEPENDENTVARIAELE: } & \text { AVC } & \text { R-SQUARE } & \text { F-RATIO } & \text { P-VALUE ON F } \\\text { OESERVATIONS: } & \text { 35 } & \mathbf { 0 . 8 7 1 3 } & 108.3 & \mathbf { 0 . 0 0 0 1 } & \\& & \begin{array} { l } \text { PARAMETER }\end{array} & \text { STANDARD } & & \\\text { VARIAELE } & & \text { ESTIMATE } & \text { ERROR } & \text { T-RATIO } & \text { P-VALUE } \\\text { INTERCEPT } & & 43.40 & 13.80 & \mathbf { 3 . 1 4 } & \mathbf { 0 . 0 0 3 6 } \\\text { Q } & & - \mathbf { 2 . 8 0 } & \mathbf { 0 . 9 0 } & - \mathbf { 3 . 1 1 } & \mathbf { 0 . 0 0 3 9 } \\\text { Q2 } & & \mathbf { 0 . 2 0 } & \mathbf { 0 . 0 5 } & 4.00 & \mathbf { 0 . 0 0 0 4 }\end{array}

-At Straker Industries, average variable cost (AVC) reaches its minimum value at $________.
A) $24.50
B) $33.60
C) $72.80
D) $121.80

Refer to the Following: a Firm Estimates Its Long-Run Production Q=−0.0075K−3L3+12K2L2Q = - 0.0075 K ^ { - 3 } L ^ { 3 } + 12 K ^ { 2 } L ^ { 2 }Q=−0.0075K−3L3+12K2L2

Multiple Choice

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Refer to the Following:
a Firm Estimates Its Long-Run Production $Q = - 0.0075 K ^ { - 3 } L ^ { 3 } + 12 K ^ { 2 } L ^ { 2 }$

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