1- The mean starting salary of a business graduate is $42,200 with a standard deviation of $2,700. Below what salary do 10% of business students make? Include2decimalsin your answer.

2-The mean time a cell phone battery lasts before it needs to be charged is 15.3 hours with a standard deviation of 2.1 hours. What is the probability a cell phone battery lasts longer than 15.9 hours before it needs to be charged?Include4 decimalsin your answer.

3-The mean starting salary of a business graduate is $42,200 with a standard deviation of $2,700. Above what salary do 30% of business graduates make?Include2decimalsin your answer.