How many integer values for 'a' satisfy the inequality?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

How do i solve uniform motion problems?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract