The Sizes of Two Matrices Are Given $\mathrm { A }$

question 55

Multiple Choice

The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product
can be calculated.
- $\mathrm { A }$ is $1 \times 4$ ; B is $1 \times 4$ .

• A) \(\mathrm { AB }\) is \(1 \times 1 ; \mathrm { BA }\) is \(4 \times 4\).
• B) \(\mathrm { AB }\) is \(4 \times 1 ; \mathrm { BA }\) is \(1 \times 4\).
• C) AB cannot be calculated; BA cannot be calculated.
• D) \(\mathrm { AB }\) is \(1 \times 4\); \(\mathrm { BA }\) is \(4 \times 1\).

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Definitions:

Creating Subgoals

The strategy of breaking down a goal into smaller, more manageable tasks or objectives that are easier to achieve step by step.

Using Algorithms

The practice of applying a step-by-step procedure or formula for solving problems or performing tasks.

Confirmation Bias

The tendency to search for, interpret, favor, and recall information in a way that confirms one's preexisting beliefs or hypotheses.

Representativeness Heuristic

A cognitive bias in decision making, where the likelihood of an event is estimated based on how similar it is to the typical case.