Which student performed the best on the test when compared to the rest of their class?

2nd period: mean was 17.1 and standard deviation was 1.2 Sally scored a 18

4th period: mean was 18.9 and standard deviation was 0.4 --- Chloe scored a 20

3rd period: mean was 13.5 and standard deviation was 3.7 --- Ronald scored a 17

1st period: mean was 15.3 and standard deviation was 2.4 -- Danny scored a 19

Tom is making a punch that contains 80% cranberry juice and the rest ginger ale. the punch has 2 liters of ginger ale. part a: write an equation using one variable that can be used to find the total number of liters of cranberry juice and ginger ale in the punch. define the variable used in the equation and solve the equation. hint: 0.8x represents the number of liters of cranberry juice in the punch. (5 points) part b: how many liters of cranberry juice are present in the punch? show your work.

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3