Evaluate the Determinant $\left| \begin{array} { l l l l } 2 & 9 & 3 & 6 \\8 & 9 & 4 & 4 \\2 & 4 & 6 & 5 \\2 & 7 & 7 & 2\end{array} \right|$

question 9

Multiple Choice

Evaluate the determinant.
$\left| \begin{array} { l l l l } 2 & 9 & 3 & 6 \\8 & 9 & 4 & 4 \\2 & 4 & 6 & 5 \\2 & 7 & 7 & 2\end{array} \right|$

• A) -21
• B) 1280
• C) -12
• D) -36

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Definitions:

Marginal Cost

An increase in the full cost that comes from producing an additional unit of a product or service.

Monopolistic Competition

A market structure characterized by many firms selling products that are substitutes but not perfect substitutes, leading to each firm having some market power.

Perfect Competition

A market structure characterized by an infinite number of small firms, identical products, and easy market entry and exit, leading to companies not having pricing power.

Monopolistic Competition

A market structure characterized by many firms selling products that are similar but not identical, allowing for some differentiation and price control.