50 points!
joyce is 50 years old and thinks her plan for retirement will not provide enough income by age 65. what is the surest way for her to increase her retirement income?
saving a little more each year
retiring three years earlier
retiring three years later
switching from 401(k) plans to iras

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.