Answer:
=376.8 
Step-by-step explanation:
V=n
Where V is the volume , r is the radius and h is the perpendicular height .
r =
m=6
h = 10m
n=3.14
v= 3.14 * 6*6 *
=376.8 
The answer would be B C E hope this helps :)
The one the blue is on! Hope that helped
A) He wanted to create zero pairs on the left side of the equation to get a positive coefficient of x on the right side