Pls me with the yu lin problem (4 and 5) u so ! (brainliest will be given hopefully! ) (random answers gets moderated.)

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.

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21