Calculus
posted by Robin .
According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches.
A. What is the probability that an adult male chosen at random is between 61 inches and 71 inches tall?
B. What is the probability that an adult male chosen at random is more than 6 feet tall?

a good place to play around with Z table stuff is
http://davidmlane.com/hyperstat/z_table.html 
Awesome! I got .7603 and .142 as my answer. Thank you!