Help me pls

Item 1 solve for s. s+24=90 −114 −66 66 114

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.

What is the value of x? enter your answer in the box.