Posttest 3. simplify the expression.
please and thank you

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.

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.