Either the Dimensions of Two Matrices or the Matrices Themselves $\mathrm { A }$

question 83

Multiple Choice

Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and
the product BA. If either is not defined, say so.
- $\mathrm { A }$ is $2 \times 1$ ; B is $1 \times 1$ .

• A) \(\mathrm { AB }\) is \(2 \times 2\); BA is \(1 \times 1\).
• B) \(\mathrm { AB }\) is not defined; \(\mathrm { BA }\) is \(1 \times 2\).
• C) \(\mathrm { AB }\) is \(2 \times 1\); \(\mathrm { BA }\) is not defined.
• D) \(\mathrm { AB }\) is \(1 \times 2\); \(\mathrm { BA }\) is \(1 \times 1\).

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Definitions:

Atkinson-Shiffrin Model

A theory of memory formation that describes a sequential process involving sensory memory, short-term memory, and long-term memory.

Implicit Memories

Memories that are not part of our consciousness, forming without intentional learning or conscious thought, such as procedural memory for tasks.

Short-Term Memories

The part of memory where small amounts of information can be stored for a short period of time.

Sensory Memories

The shortest-term element of memory which allows individuals to retain impressions of sensory information after the original stimuli have ended.