Idon't know how to do this. i need .

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?

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

The soccer team at your school wants to spray paint a design on the middle of the playing field. the design will include this soccer ball. you have been asked to enlarge the drawing of this ball to use for the painting on the field. explain how to accurately enlarge or reduce the size of objects such as the soccer ball.