Find the measure of angle "b" ​

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?

What is the slope of the equation y =

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x