Evaluate the Expression $$r = \langle 9 , - 9 , - 4 \rangle , \mathbf { v } = \langle 6 , - 9 , - 6 \rangle , \mathbf { w } = \langle 6 , - 1 , - 3 \rangle$$

question 113

Multiple Choice

Evaluate the expression.
- $$r = \langle 9 , - 9 , - 4 \rangle , \mathbf { v } = \langle 6 , - 9 , - 6 \rangle , \mathbf { w } = \langle 6 , - 1 , - 3 \rangle$$
$( \mathbf { r } + \mathbf { v } ) \cdot \mathbf { w }$

• A) 138
• B) \(\langle - 90 , - 18 , - 30 \rangle\)
• C) \(\langle - 54 , - 81 , - 24 \rangle\)
• D) \(- 138\)

---

Definitions:

Dichotomous Questions

Type of survey question that offers two distinct choices for respondents, such as "yes or no" answers.

Completion Rate

The proportion of individuals who finish a task, course, or program out of those who started it, often expressed as a percentage.

Survey Completion

The process of successfully answering all questions or items on a survey or questionnaire.

Observational Study

A study in which the researcher observes and records behavior without manipulating variables or conditions.