Geometry, please answer question ASAP

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.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.