Please help me ill give all points

What is always true about a positive integer raised to a negative odd power?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Once george got to know adam, they found that they really liked each other. this is an example of what factor in friendship