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Simplify the radical expression. The variable represents a positive real number.
Life Expectancy
The average number of years an individual is expected to live, based on statistical averages of age-specific death rates.
Time Zones
Geographic regions defined by the uniform standard time they observe, which are typically offset from Coordinated Universal Time (UTC).
REM Sleep
A stage of sleep characterized by rapid eye movements, vivid dreaming, and increased brain activity.
Higher Mammals
Mammals that have a more complex brain structure, including primates, cetaceans, and humans, often characterized by advanced cognitive abilities and social behaviors.
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