state prominent contributions of Al-Khwarezmi in the field of Mathematics by mentioning two valid points. [

3.a

4.d

5.b

6.b

7.c

8.a

9.d

10.a

i think it was   tsar alexander ii

the foundation of greek city-states: following the fall of the mycenaean civilization in the 10th century bc, the area surrounding the empire went through its own mini dark ages. answer and explanation