Use a Graphing Calculator to Find the Inverse of the Matrix

question 167

Multiple Choice

Use a graphing calculator to find the inverse of the matrix. Give five decimal places, if necessary.
- $$A = \left[ \begin{array} { c c } \frac { 4 } { 3 } & 52 \\\sqrt { 21 } & 8.754\end{array} \right]$$

• A)
• \[\left[ \begin{array} { c c }
• 0.75 & 0.01923 \\
• 0.21822 & 0.11423
• \end{array} \right]\]
• B)
• \[\left[ \begin{array} { r r }
• - 0.03863 & 0.22946 \\
• 0.02022 & - 0.00588
• \end{array} \right]\]
• C)
• \[\left[ \begin{array} { r r }
• - 0.70513 & 0.41667 \\
• 0.36859 & - 0.10417
• \end{array} \right]\]
• D)
• \[\left[ \begin{array} { l l }
• 1 & 0 \\
• 0 & 1
• \end{array} \right]\]

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Definitions:

Epidural Space

A fat-filled space surrounding the spinal cord that provides a protective cushion and houses nerves and blood vessels.

Meninges

Three protective membranes that envelop the brain and spinal cord, comprising the dura mater, arachnoid mater, and pia mater.

Reciprocal Innervation

A neurological process where the activation of one muscle is accompanied by the relaxation of its antagonist muscle.

Stretch Reflex

A muscle reflex that responds to the stretching within the muscle, automatically contracting the muscle in response to its stretching in order to protect the muscle from over-stretching.