Justin takes three times as long to do a job as carl does supposed t represent the time it takes carl to do the job then 3t represent the time it takes justin how long does it take justin if car takes a 30sec or 90 sec or a 2-minute

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.