Answer:
the answer is for the question is B
Carbon is the answer. IF oxygen were on the list it would also be correct but for this its Carbon<span />
The closer you are to the ground the more accurate you'll be. That's why most snipers are in the "prone" position.
Answer:
15m/s
Explanation:
add the two speeds and divide by 2
10+20=30
30/2=15