Answer:
Because it takes precision to a lot of things in tech and Eng. We need to measure all kinds of things, like wood, metal/etc. for computers and things that we use everyday, Because our world goes around being precise about things that we need everyday, like tables and things.
Explanation:
If you include all zeroes, then it should be 1,000,000,000. Otherwise it’s 999,999,999.
Think of how between 0-9 theres 10 numbers, and use that logic towards 000000000-999999999
