Find the measure of the indicated angle to the nearest degree. What is angle M?

Given right triangle xyz, which correctly describes the locations of the sides in relation to

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?