3 x 107 is already in scientific notation (: 30,000,000 is the standard notation (if that's what you meant to ask)
14,200,000 in Scientific Notation = 1.42 x 107
1,4200,000 in Scientific Notation = 1.42 x 107
11,200,000 in Scientific Notation = 1.12 x 107
57,910,000 in Scientific Notation = 5.791 x 107
93 million in Scientific Notation = 9.3 x 107
6.29 x 107 is already in scientific notation.
3 x 107 is already in scientific notation (: 30,000,000 is the standard notation (if that's what you meant to ask)
14,200,000 in Scientific Notation = 1.42 x 107
35,000,000 in Scientific Notation = 3.5 x 107
62,153,000 in Scientific Notation = 6.2153 x 107
34,500,000 in Scientific Notation = 3.45 x 107
1,4200,000 in Scientific Notation = 1.42 x 107
31,536,000 in Scientific Notation = 3.1536 x 107
11,200,000 in Scientific Notation = 1.12 x 107
57,910,000 in Scientific Notation = 5.791 x 107
44,000,000 in Scientific Notation = 4.4 x 107