GIVING BRAINLIEST PLEASE HELP!! -if you answer correctly ill give you brainliest which will give you 28pts-

C

Step-by-step explanation:

The formula is πD, since D is 6, it is C, 6π

B.

Step-by-step explanation:

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

25.2

step-by-step explanation:

2+4x6-8/10= 25.2