Short Answer

Environmental Safety Reporting

An environmental technician is documenting a safety threshold where the dissolved oxygen level in a water sample must be strictly greater than 3 mg/L (x>3x > 3). Provide the interval notation used to represent this solution set and identify the specific graphical symbol (parenthesis or bracket) that must be placed at the number 3 on a number line.

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Updated 2026-09-19

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