URGENT!! The binomial expansion x^3-12x^2+48x-64 can be expressed as (x+n)^3. What is the value of n? A. -8 B. -4 C. 4 D. 8

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.