When Cesar Solis was 7, his parents deposited $30,000 into a trust fund that pays 5% annual interest, compounded monthly. What is the balance in this account on Cesar's 16th birthday?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.