Simplify by using order of operations: 22 - (8∙1) ÷ (6 - 4) - 2

Asap will give brainliest and a lot of points

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?

Need solving this second acceleration problem.