Section: Mathematics

8) Which expression represents 0.000000004 in scientific notation?

1. 4x10^-9
2. 4x10^-8
3. 4x10⁸
4. 4x10⁹
5. 4x10¹⁰

Just move the decimal to the right 9 times so that it is just past the principal number, which is 4 in this case. Because we moved it to the right we use a negative number in the notation.