Clara is completing a math project. she has two ropes with length 126cm and 291cm. she wants to cut them into pieces of equal length without remainder. what is the greatest possible length of each smaller pieces of rope??this is my homework so pls kindly help me for the answer i would really appreciate it!✨

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.