Determine whether $p=\$18$ is meaningful for a price domain $0\le~p\le~30$. Write and verify the compound inequality, identify the closed-interval endpoint policy, and state the contextual conclusion.

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No. Since 18≥30 is false, $18 fails the upper bound.

No. Since $18 is not an endpoint, it is outside the interval.

Yes. Since 0≤18≤30, $18 is inside the closed price interval.

No. Only prices that are whole multiples of $30 are meaningful.

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Curriculum context

Course: Math II
Standard: F-IF.5
Category: Functions
Domain: Interpreting Functions
Objective: Relate the domain of a quadratic function to its graph and situation.
Problem type: Decide whether a given input is meaningful for a quadratic model in context