Tính tích phân    
2 2 2
C
I xy y dx xy x dy     
với C là biên của miền
2 2 D x y x y x y : 4 ,0 , 2 0      
lấy theo cùng chiều kim đồng hồ

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

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.

I’m really confused and need to learn this