1.5 billion can be written in scientific notation as 1.5x10^9 or it can be written in standard form as
1,500,000,000
580,000,000
1,600,000
1,000,000,000
1,300,000,000
It is 7,046,000,000.
29,000,000,000
3,810,000,000
7,000,000,000 is 7 billion
1,560,000,000
1,100,000,000
69,000,000,000
9,000,003,000