4' 9" + 9' 4" = ____________________

question 19

Short Answer

4' 9" + 9' 4" = ____________________.

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Definitions:

Circadian Control

The regulation of biological rhythms in living organisms, following roughly a 24-hour cycle.

Sympathetic Nervous System

The part of the autonomic nervous system that controls the body's responses to stress or emergencies, such as increasing heart rate.

Circadian Control

The regulation of biological rhythms and processes in accordance with the 24-hour cycle of day and night.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles, often used as a dietary supplement to aid sleep.