The American Optometric Association Recommends Children Participate in Outdoor Activities

question 147

Multiple Choice

The American Optometric Association recommends children participate in outdoor activities using the 20-20-20 rule.What is the meaning of this rule?

• A)Children should spend 20 minutes a day outside over a span of 20 days.
• B)Children should spend 20 minutes a day talking to 20 friends over a span of 20 days.
• C)For every 20 minutes spent outside, children should spend at least 20 minutes reading 20 pages from a book.
• D)For every 20 minutes spent on a computer or reading, children should spend 20 seconds looking at things at least 20 feet away.

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Definitions:

Short-Run Equilibrium

A condition in a market or economy where all forces are balanced, but only temporarily; prices and output may change until a long-run equilibrium is achieved.

Long-Run Equilibrium

A condition where an economy or market achieves a stable state after adjustments, where supply equals demand over an extended period.

Pure Competition

A market structure characterized by a large number of sellers and buyers, free entry and exit, and a product that is homogeneous across producers.

P = MC

An economic condition where price equals marginal cost, indicating optimal resource allocation in perfectly competitive markets.