The Sizes of Two Matrices a and B Are Given $2 \times 1$

question 25

Multiple Choice

The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these
products exist.
-A is $2 \times 1$ , and $B$ is $1 \times 1$ .

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

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Definitions:

Contra Asset

An account on a company's balance sheet that offsets against an asset account on the same balance sheet.

Miscellaneous Revenue

Income from sources other than the main business activities, such as rental income or interest income.

Cash Over And Short

An account that records the discrepancies between the actual cash received and the expected amount.

Credit Balance

An accounting term that signifies a positive balance in a liability, revenue, or equity account, which increases on the credit side and decreases on the debit side.