Answered You can hire a professional tutor to get the answer.

# Fix it Copiers advertises a mean time of 100 minutes for office calls with a standard deviation of 25 minutes. What percentage of calls are completed...

Fix it Copiers advertises a mean time of 100 minutes for office calls with a standard deviation of 25 minutes. What percentage of calls are completed between 100 and 120 minutes? also 20% of their jobs take more than how much time?