What is the Interquartile Range (IQR)?
1,4,4,5,5,5,6,6,7,7,7,8,8,9,11

Describe the relationship between the angles of similar triangles and the sides of similar triangles

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.