Find the product of (x − 8)2 and explain how it demonstrates the closure property of multiplication. x2 − 64; is a polynomial
x2 − 16x + 64; is a polynomial
x2 − 64; may or may not be a polynomial
x2 − 16x + 64; may or may not be a polynomial

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

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