Determine the Union $\boldsymbol { X } \cup \boldsymbol { Y }$

question 180

Multiple Choice

Determine the union $\boldsymbol { X } \cup \boldsymbol { Y }$ . Express the answer in interval notation.
- $X = \{ x \mid x > - 9 \}$ and $Y = \{ x \mid x \leq 16 \}$

• A){ }
• B) \(( 16 , - 9 ]\)
• C) All real numbers
• D) \(( - \infty , 16 ] \cup ( - 9 , \infty )\)

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