Solve the Problem Using Matrices $19.69 \%$ Copper to Make Jewelry $15 \%$

question 227

Multiple Choice

Solve the problem using matrices.
-Anne and Nancy use a metal alloy that is $19.69 \%$ copper to make jewelry. How many ounces of an alloy that is $15 \%$ copper must be mixed with an alloy that is $22 \%$ copper to form 100 ounces of the desired alloy?

• A) \(72 \mathrm { oz }\)
• B) \(67 \mathrm { oz }\)
• C) \(35 \mathrm { oz }\)
• D) \(33 \mathrm { oz }\)

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Definitions:

Perceptual Adaptation

The ability of the body to adjust to an environment by filtering distractions.

Audition

The sense or act of hearing, which is critical for communication, alertness, and social interactions.

Brightness

the perception of how luminous or radiant a light source appears to the eye, often influenced by its intensity and surroundings.

Loudness

The perception of the intensity of sound waves, often described as the volume, and can be measured in decibels.