Write an equation for the graph below in terms of x

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?

Predict which statements are true about the intervals of the continuous function. check all that apply

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)