Circle O is shown. Chords B D and C A intersect at point E. Angle B E A is 112 degrees. The measure of arc B A is 120 degrees. The measure of arc C D is z. What is the value of z? 52° 104° 116° 208°

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?

Identify the graph of y = ln x + 1.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.