That is a one hundred thousand number. To round it you need to know this: 5 or more make it go up (make it the next number. For example: 19,530. It would be rounded to 20,000 because of the 5) 4 or less let it be (EXAMPLE : 8,213. It would be 8,000. Because of the 4.)
Then you need to find the ten thousand. In this case it is the 0. (104,229) Then you round it off to 100,000. The answer is 100,000.
I cant answer if i dont know what math would you mind telling me what math
Answer:

Step-by-step explanation:
For question #1:

For question #2:

Answer:
I think it volume will be 234m3