Convert the following equation into standard form

Which of the following is the shape of a cross section of the figure shown below

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.

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?