Compute the Determinant of the Matrix by Cofactor Expansion $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

question 8

Multiple Choice

Compute the determinant of the matrix by cofactor expansion.
- $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

• A) 55
• B) 891
• C) \(- 197\)
• D) \(- 55\)

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Definitions:

Epiglottis

A leaf-shaped flap of cartilage located behind the tongue at the top of the larynx; its function is to seal off the windpipe during eating, to prevent food from entering the airway.

Larynx

A structure in the throat containing the vocal cords; it is involved in breathing, producing sound, and protecting the trachea against food aspiration.

Alveoli

are the tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

Gas Exchange

The biological process by which gases (mainly oxygen and carbon dioxide) are transferred between the blood and the external environment during the act of breathing.