Me will give brainlist for right answer

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?

Find the quotient with the restriction.

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?