50 POINTS AND BRAINLIEST! Suppose that there are 20 numbers in a data set and that they are all different.
a) How many of the values in this data set are between the first quartile and the third quartile?

12. decide whether each statement is always true, sometimes true, or never true. a. when corresponding points of an original figure and its reflection are connected, the resulting segments are all perpendicular to the line of reflection. b. when a point is reflected over a horizontal line, the y-coordinate of the point stays the same. answer both questions and explain

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?