Decide Whether or Not the Set Is Closed Under Addition

question 49

Multiple Choice

Decide whether or not the set is closed under addition.
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• A)Closed
• B)Not closed

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Definitions:

Iris

The colored part of the eye surrounding the pupil, controlling the amount of light entering the eye by adjusting the size of the pupil.

Sclera

The white, outer layer of the eyeball, providing protection and form.

Ciliary Muscle

Smooth muscle in the ciliary body of the eye.

Retina

is the light-sensitive layer at the back of the eye that contains photoreceptor cells, which convert light into neural signals for visual recognition.