3 billion in scientific notation
3 billion in scientific notation is 3 x 10^9.
To express 3 billion in scientific notation, we need to write it as a number between 1 and 10 multiplied by a power of 10.
Since 3 billion is written as 3,000,000,000 in standard form, we can express it in scientific notation as:
3.0 × 10^9