It is 4 billion = 4,000,000,000
4 Billion yeas old. 1000 Million = 1 Billion.
One hundred million in ONE billion. In billions, depends on how many billions.
It takes 146442 billions.
28.447
36.536
101 million = 0.101 billion.
none. a million is less than a billion
1,500 million.
5.7224 bilion
4000
805 million equals 0.805 billion.
A thousand million is a billion so the answer is 18.