A36 foot long ribbon is cut into three pieces. the first piece is half as long as the second piece. the third piece is 1 foot longer than twice the length of the second piece. how long is the longest piece of ribbon?

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.