It is: 75,000,000 or as 7.5*107 in scientific notation
5.31 million in number form is 5,310,000
28 million in number form is 28,000,000
One million in number form is 1,000,000
19.8 million in number form is 19,800,000
2.79 million in number form is 2,790,000
80,000,000 is 80 million in number form.
378.8 million in number form is 378,800,000
251 million in number form is 251,000,000
8.4 million in number form is 8,400,000
689 million in number form is 689,000,000
3.42 million in number form is 3,420,000
0.32 million in number form is 320,000