To evaluate the expression \( \sqrt{19} - 32 \), we need to analyze each part of the expression.
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\( \sqrt{19} \) is an irrational number because 19 is not a perfect square.
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The number 32 is a whole number and also an integer.
When we subtract a whole number (32) from an irrational number (\( \sqrt{19} \)), the result remains an irrational number. Therefore, the expression \( \sqrt{19} - 32 \) is an irrational number.
The correct response is: an irrational number