* Standard form: 125,000,000,000

* Scientific notation: 1.25 x 10¹¹

Explanation:

* 1.25: We move the decimal point 11 places to the left to get a number between 1 and 10.

* 10¹¹: The exponent represents how many places we moved the decimal. Since we moved it 11 places to the left, the exponent is positive 11.