Use the Dot Product to Find the Magnitude of U $\mathbf { u } = \langle 6 , - 2 \rangle$

question 29

Multiple Choice

Use the dot product to find the magnitude of u if $\mathbf { u } = \langle 6 , - 2 \rangle$

• A) \(\| \mathbf { u } \| = 4\)
• B) \(\| \mathbf { u } \| = 12\)
• C) \(\| \mathbf { u } \| = 20\)
• D) \(\| \mathbf { u } \| =\) \(4 \sqrt { 10 }\)
• E) \(\| \mathbf { u } \| =\) \(2 \sqrt { 10 }\)

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Definitions:

Enamel

The hard, protective outer covering of the crown of a tooth, made of mineralized substances.

Cementum

A specialized, calcified substance covering the root of a tooth, playing a vital role in tooth stability by anchoring the tooth to the jawbone through the periodontal ligament.

Dentin

The hard, dense, bony tissue forming the bulk of a tooth beneath the enamel.

Crown

In dentistry, a type of dental restoration which completely caps or encircles a tooth or dental implant, used to improve their appearance or strength.