The Sizes of Two Matrices a and B Are Given $A$

question 3

Multiple Choice

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

• A) \(\mathrm { AB }\) is \(2 \times 1 , \mathrm { BA }\) is undefined.
• B) \(\mathrm { AB }\) is \(1 \times 2 , \mathrm { BA }\) is \(1 \times 1\).
• C) \(\mathrm { AB }\) is \(2 \times 2 , \mathrm { BA }\) is \(1 \times 1\).
• D) \(A B\) is undefined, \(B A\) is \(1 \times 2\).

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Definitions:

Plantwide Overhead Rate

A single predetermined overhead rate that is used throughout a plant.

Activity-based Costing

This accounting methodology allocates indirect costs to specific products or services based on their usage of activities, enhancing accuracy in costing.

Departmental Overhead Rates

The allocation of indirect costs to specific departments based on a predetermined rate, for more accurate cost distribution.

Allocating Overhead Costs

The process of distributing indirect costs to specific cost objects, such as products or departments, to accurately reflect the costs of production.