Given $a = 12 , b = 5$ , And $c = 15$

question 20

Multiple Choice

Given $a = 12 , b = 5$ , and $c = 15$ , use the Law of Cosines to solve the triangle for the value of $C$ . Round answer to two decimal places.

• A) \(60.34 ^ { \circ }\)
• B) \(117.82 ^ { \circ }\)
• C) \(80.45 ^ { \circ }\)
• D) \(17.15 ^ { \circ }\)
• E) \(45.04 ^ { \circ }\)

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Definitions:

Concentration Decrease

A reduction in the amount of a substance present in a specified volume of solution, typically resulting from dilution or chemical reaction.

Chemical Reaction

A process that involves rearrangement of the molecular or ionic structure of substances, resulting in the formation of new products.

Nitrogen Gas

A diatomic molecular gas (N2) that constitutes 78% of the Earth's atmosphere, colorless, odorless, and mostly inert.

Nitrogen Monoxide

A colorless gas with the formula NO; it is an important signaling molecule in the body and contributes to various biological processes.