The management at Ohio National Bank does not want its customers to wait in line for service

Question:

The management at Ohio National Bank does not want its customers to wait in line for service for too long. The manager of a branch of this bank estimated that the customers currently have to wait an average of 8 minutes for service. Assume that the waiting times for all customers at this branch have a normal with a mean of 8 minutes and a standard deviation of 2 minutes.
a. Find the probability that a randomly selected customer will have to wait for less than 3 minutes.
b. What percentage of the customers have to wait for 10 to 13 minutes?
c. What percentage of the customers have to wait for 6 to 12 minutes?
d. Is it possible that a customer may have to wait longer than 16 minutes for service? Explain.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...