Answer the question in the picture.

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Solve the system of equations. y= 2x y= x^2 - 15

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.