Assume The diameter at breast height (in.) of trees of a certain type is normally distributed with a mean of 8. and a standard deviation of 2.

Assume The diameter at breast height (in.) of trees of a certain type is

normally distributed with a mean of 8.8 in. and a standard deviation of 2.8 in.

What is the probability that a randomly selected tree will be at least 12

in. in diameter?