In between the 4 given expressions, y²⁴ is a perfect cube.
When a number is multiplied by the same number two times simultaneously, then the number found is a perfect cube. The product will be of the three same number.
Given expressions are:
1. x⁸ = x² × x² × x² × x² = (x²)³ × x²
Hence, it is not a perfect cube.
2. y²⁴ = y⁸ × y⁸ × y⁸ = (y⁸)³
Hence, it is a perfect cube.
3. m²⁸ = (m⁹)³ × m
Hence, it is not a perfect cube.
4. s⁶⁴ = (s²¹)³ × s
Hence, it is not a perfect cube.
Learn more about a perfect cube here: https://brainly.com/question/13790626
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