To determine the correct sign (< or >) for the statement \(-3 \sqrt{25} ? -1.5\), we first need to calculate \(-3 \sqrt{25}\).
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Calculate \(\sqrt{25}\): \[ \sqrt{25} = 5 \]
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Now, multiply by \(-3\): \[ -3 \times 5 = -15 \]
Now we can compare \(-15\) and \(-1.5\): \[ -15 ? -1.5 \]
Since \(-15\) is less than \(-1.5\), we can say: \[ -15 < -1.5 \]
Therefore, the correct sign is: \[ < \]
So the complete statement is: \(-3 \sqrt{25} < -1.5\).