Solve Start Fraction one-third over 5 end Fraction = Start Fraction a over 20 End Fraction

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?

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters