What is the critical value z* for constructing an 85% confidence interval?

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.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?