2% is 2/100, so we have 2/100*7,000,000,000=140,000,000 people with red hair.
You start off by looking at which operation to do first. According to PMDAS (parentheses, multiplication, division, adding, and subtracting) you would do division first so
220-450/3
220-150
Then you complete the rest
220-150=70
Hopefully this helps! :)
Answer:
7.31 x 10^-23
<em>Answer: CO2 (1 atom of carbon and 2 atoms of oxygen)</em>
3.34 x 10^-24
<em>Answer: H2 (2 atoms of hydrogen)</em>
2.821 x 10^-23
<em>Answer: NH3 (1 atom of nitrogen and 3 atoms of hydrogen)</em>
7.64 x 10^-23
<em>Answer: NO2 (1 atom of nitrogen and 2 atoms of oxygen)</em>
Step-by-step explanation:
hope this helps :)
I believe this would be c), d) e)