Use Inequality Notation and Interval Notation to Describe the Set

question 217

Multiple Choice

Use inequality notation and interval notation to describe the set. ​
Y is no more than 20.
​

• A)Inequality : y ≤ 20 Interval : (∞, -20]
• B)Inequality : y ≤ 20 Interval : (-∞, 20]
• C)Inequality : y ≥ 20 Interval : (-∞, 20]
• D)Inequality : y ≥ 20 Interval : (-∞, -20]
• E)Inequality : y ≤ 20 Interval : (∞, 20]

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Definitions:

REM Sleep

A stage of sleep characterized by Rapid Eye Movements, during which most dreaming occurs and brain activity is akin to being awake.

Strenuous Physical

Strenuous physical activities involve intense or vigorous effort that requires considerable energy and endurance.

Short Naps

Brief periods of sleep, generally lasting less than 30 minutes, intended to quickly restore alertness and performance.

Insomnia

Recurring problems in falling or staying asleep.