(1/16)^(x+3) = (1/4)^(x+1)

Which of the following statement about pascal's triangle are true?

9/10 divide by -3/15 as a mixed number

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.