Which value for x completes the conditional relative frequency table by column

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.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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