Straker Industries Estimated Its Short-Run Costs Using a U-Shaped Average $A V C = a + b Q + c Q ^ { 2 }$

Multiple Choice

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. At what level of output is average variable cost (AVC) at its minimum point for Straker Industries?

A) 0.14
B) 4.7
C) 7
D) 14
E) 28