Plz help me, It's due in a hour

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.

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Explain why the factor 1.5 is broke. into two numbers in the model.