How do you write ten billion in scientific notation?

To write ten billion in scientific notation, you would express it as 1 x 10^10. This is done by moving the decimal point 10 places to the right to convert 10,000,000,000 to 1.0, and then multiplying by 10 raised to the power of 10. In scientific notation, the number is always expressed as a decimal greater than or equal to 1 but less than 10, multiplied by a power of 10.