1.04*10^9=1,040,000,000 by moving the decimal 9 spots to the right.
One million is 1.000,000, 100 million is 100,000,000, 1 billion is 1,000,000,000, and 10 billion is 10,000,000,000. Since this has the same number of digits as 1 billion and is closer to 1 billion than 10 billion due to that the second digit is lower than 5, our answer is C
