Find a formula for the nth term of the arithmetic sequence.
First term 9
Common difference -2
an = [ ? ]n + [ ?]

Which statements regarding the diagram are true? check all that apply.

Evaluate the following expression 1/3^2

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.