Evaluate the Following Expression If It Represents a Real Number

question 93

Multiple Choice

Evaluate the following expression if it represents a real number.

• A) 8
• B) 4
• C) -8
• D) -4
• E) not a real number

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Definitions:

Common Cold

A viral infection of the upper respiratory tract, characterized by sneezing, sore throat, coughing, and congestion.

Chemoreceptors

Sensory receptor cells or organs that transduce (convert) chemical substances in the environment or blood into signals perceived by the nervous system.

Carbon Dioxide

An invisible, scent-free gas generated through the combustion of carbon-based materials and in the act of respiration. It exists naturally within the Earth's atmosphere and is utilized by plants during photosynthesis.

Oxygen

A chemical element with symbol O, essential for cellular respiration in aerobic organisms and a component of the Earth's atmosphere.