Toby"s Trucking Company determined that the distance traveled per truck per year is normally 2 distributed with a mean of 50,000 miles and a variance...

Toby"s Trucking Company determined that the distance traveled per truck per year is normally 2 distributed with a mean of 50,000 miles and a variance of 144,000,000 miles . 1. What is the probability that a randomly selected truck will travel over 39,000 miles per year? What two yearly amounts for annual distance traveled bound the middle 39% of the distribution?