Altitude above sea level is given in positive values and below sea level is given in negative values witch situation describes a hiker in Death Valley stopping at an altitude of 0 feet

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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Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x