I don't no this answer so sorry
Answer:
velocity
Step-by-step explanation:
Hiya!
So, 6 billion is 100%. 50% is 3 billion. 25% is 1.5 billion. 20% must be 1.2 billion because 1.2 × 5 is 6. I know that 20% is 1/5 of 100%, and that's how I got my answer.
If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer, if other people did not provide a helpful answer (but, I'm sure they did!). I want to be able to assist more users one-on-one! :)
we have the numbers
we know that
The sum of a number and its additive inverse is 0
so
therefore
the number n is equal to 
the sum is equal to zero
the answer Part a) and Part b) in the attached figure
