Put simply, it divides two sides of a triangle equally. The midpoint of a side divides the side into two equal segments. As you can see in the picture below, DE is the midsegment of the triangle ABC. Point D divides segment AB into two equal parts, and point E divides segment CB into two equal parts.
For the table 0.2 would be (1/5) 0.5 would be (1/2). And 0.7 would be (7/10).
For number 2 I would say the denominator changed each time
2^-1 = 1/2 : .
1/2 (6x-12)
=1/2* 6x - 1/2* 12
Basically ure dividing everything inside the brackets by two. Or multiplying by a half which is essentially the same thing.
Use the formula
1/3*pi*r^3*h=Volume
It is simple algebra
Mean- 103
Median- 23
Mode- 12