Which of the following are equivalent to -1/2(10+1/4) A. -5 - 1/4
B. -5 - 1/8
C. -5 + 1/8
D. -5 + 1/4

this is subtraction and adding.

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.