B would be the answer. hope it helps !
Answer:
v = ± 
Step-by-step explanation:
Given
E =
( multiply both sides by 2 to clear the fraction )
2E = mv² ( divide both sides by m )
= v² ( take the square root of both sides )
v = ± 
27 in³
the volume of a cube = (length of side )³ = 3³ = 27 in³
When they are collinear, they lie on the same straight line