Answer:
i think you forgot the rest of the question?
Basically, the question is asking, what will happen if we increase 9 by 30%?
first, what is 30% of 9?

So, the increase will be by 2.7 days,
So the total amount will be 9+2.7=11.7 - this is the correct answer.
Answer:
Add 0.31 + 0.33 + 0.45;
Step-by-step explanation:
Hope I got it right! If not i'm sorry.
Answer:
7
Step-by-step explanation:
1) 1 degree = 1*10^-10 A= 6.9 * 10^-9 nm