10 Exercise 7-28 (Algo) (LO7-3) 7.69 For the most recent year available, the mean annual cost to attend a private university in the United States was $20,207. Assume the points distribution of annual costs follows the normal probability distribution and the standard deviation is $4,375. Ninety percent of all students at private universities pay less than what amount? (Round z-value to 2 decimal places and your final answer to the nearest whole number.) eBook Amount Hint Print References11 7.69 points Refs ren C95 Exercise 7-20 (Algo) (LO7-3) In New York State, the mean salary for high school teachers in 2017 was $101,810 with a standard deviation of $9,620. Only Alaska's mean salary was higher! Assume New York's state salaries follow a normal distribution. a. What percent of New York's state high school teachers earn between $87,000 and $92,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) _% b. What percent of New York's state high school teachers earn between $92,000 and $107,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) _- c. What percent of New York's state high school teachers earn less than $77,000? (Round intermediate calculations to 2 decimal places and final answer to 2 decimal places.) _