Question 4:
the prime factors of two numbers are:
23 x 3 x 52 and 22 x 33 x 5 x 11
what is the highest common factor of the two numbers?
clive's
your
the hcf is the common factors.
multiply all the common factors.

2*3*5 = 30

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.