Which equation shows an example of the associative property of addition? O (-4 + 1) + 4; = -4+ (i + 41)
O(-4 + 1) + 4; = 4; + (-4; + 1)
O41-(-41 + 1) = (4i – 41) + (41 - 1)
O(-41 + 1) + 0 = (-41 + 1)

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.

What is the value of x in the this question ?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?