In order to qualify for a bowling tournament, bowlers bowl 20 games. The results are normal. The average score was 167 with a standard deviation of 24.2. What is the probability a bowler will score between 162 and 189?

I'm confused on this could anyone me and show me what i need to do to solve it.

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box