You should be able to set up a proportion between the sides something like (18+x)/x=(56+21)/56
Answer:
55
Step-by-step explanation:
hope it helps you.....
Hydrogen is around 0.000053% and Helium is around <span>0.000524%</span>
Answer:
What do you mean?
Step-by-step explanation:
Answer:the answer would be the unknown
Step-by-step explanation: