<span>D. multiplying by the quantity of 100. When you multiply a number by 100 your doing this :
1•100=100 or 20•100=2000.
A trick for this is just giving the number the 10, 100, or 1000's zeros.
Hoped I helped!</span>
The answer is B :),this sentence has to be longer LOL
Answer:
in the first question
the air move from higher concentration to lower concentration and lower to higher
Explanation:
when the oxygen gets in the place in the chest increase and when we release the air the will be contracted
when the air is outside chest will have no air
outside air will get into chest
and in verse vice
