The average water consumption per day is 48 ounces with a standard deviation of 12.8 ounces.

5. P(x ≤ 12 ounces)
6. P(x > 64 ounces)
7. P(24 ounces < x ≤ 36 ounces)
8. P(x > 90 ounces)

9. Find the z-score that corresponds with:
a) 82.12% b) 28.43%

10. If salaries of teachers In the United States are normally distributed with a mean of $42,000 and a standard deviation of $5500,

a) What is the highest salary for those teachers in the bottom 20%?

b) What is the range of salarles of 68% of the teachers according to the Empirical Rule?

c) The teachers in the top 5% are making at least what salary amount?