Which relation represents a function?

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.

Me because i don't understand how to do it.: )

What is the area of parallelogram rstu? 21 square units 24 square units 28 square units 32 square units