* Move the decimal point to the right until you have a number between 1 and 10. In this case, you'd move it two places to the right, giving you 2.5.
* Count the number of places you moved the decimal. Since you moved it two places to the right, the exponent will be -2.
* Combine the number and the exponent. This gives you 2.5 x 10⁻² meters.
