Please solve this question ASAP

Draw out the fraction then show how you would subtract 5 1/4

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

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.