{12, 17, 23, 24, 17, 15, 8, 0} What is the mean absolute deviation (MAD) of the data set?

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.

Ineed me i stuck and i don’t want to get it wrong

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.