Find the Cofactor of the Given Element A) $- 8$ B) $- 18$

question 65

Multiple Choice

Find the cofactor of the given element.
- $$\begin{array} { l } a _ { 13 } \\A = \left[ a _ { i j } \right] = \left[ \begin{array} { r r r } 7 & - 2 & 5 \\2 & 5 & 4 \\- 1 & - 9 & 3\end{array} \right]\end{array}$$

• A) \(- 8\)
• B) \(- 18\)
• C) 13
• D) \(- 13\)

---

Definitions:

Minimum Efficient Scale

The smallest amount of production a company can achieve while still taking full advantage of economies of scale regarding cost per unit.

Natural Monopoly

A type of monopoly that exists due to the high fixed or start-up costs of operating a business in a specific industry, making it inefficient for new firms to enter.

Limited Market

A market with restrictions on the scope of products or services that can be sold or on who can participate as buyers or sellers.

Pure Monopolists

Firms that are the sole provider of a product or service with no close substitutes, granting them significant control over market price.