The ff data shows the weights of preschool children in a private school in kilograms: 15, 15.5, 18, 18.3, 19, 19.3, 18, 22, 21, 21, 22, 22.5. Find the 95% confidence interval for the true mean.

Pranav and molly are selling pies for a school fundraiser. customers can buy blueberry pies and pumpkin pies. pranav sold 6 blueberry pies and 4 pumpkin pies for a total of $106. molly sold 6 blueberry pies and 3 pumpkin pies for a total of $90. find the cost of each of one blueberry pie and one pumpkin pie