(Solved): need explanation in how to get answer  Teachers' Salaries The average annual salary for all U.S ...

Teachers' Salaries The average annual salary for all U.S. teachers is \( \$ 47,750 \). Assume that the distribution is normal and the standard deviation is \( \$ 5680 \). Find these probabilities of the earnings of a teacher selected randomly. Round the final answers to at least four decimal places and intermediate \( z \) value calculations to two decimal places. Part 1 of 2 (a) Between \( \$ 28,500 \) and \( \$ 40,000 \) a year \[ P(28,50043,000)= \]