How would you greet these people in latin?
salvē.
valē.
salvētē.
valētē.

Salvētē. or Salvē.

Explanation:

Salvē means Good afternoon, and Salvētē means hello so the two would work. I hope this is helpful  

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

where is the diagram?

if you insert the diagram ill be able to you