Explain using complete sentences the difference between similarity and congruence. be sure to include what must be true of corresponding angles for each and what must be true of corresponding angles for both similar and congruent figures.

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.