The expression xy3 has a positive value. What must be true of the value of x if y is negative?

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?

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?