Which explains the information needed to calculate speed and velocity? A. Both require the total distance, but velocity also requires time and displacement.
B. Both require time, but velocity requires displacement and speed requires distance.
C. Speed requires displacement, while velocity requires distance.
D. Speed does not require time, while velocity does require time.

B. Both require time, but velocity requires displacement and speed requires distance.

Explanation:

Velocity is a vector quantity and speed is a scalar variable.

To find the velocity;

  Velocity  =

 Displacement is the distance covered along a specific direction.

So, the way displacement changes with time is the velocity. Also, the directional attribute is important in describing velocity

Now,

Speed is the distance traveled per unit of time;

       Speed  =

No directional attribute involved

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

uranium fissions/breaks up giving out energy and neutrons