To write 2.5 million in scientific notation, you follow a simple process. First, identify the place value of the number. The number 2.5 million is expressed as 2,500,000. In scientific notation, we want to express numbers in the form of a × 10n, where a is a number between 1 and 10, and n is an integer.
For 2.5 million, you can express it as 2.5. We then determine how many places we need to move the decimal point to the right to convert it back to its original form.
In this case, moving the decimal point 6 places to the right gives us: 2.5 → 25 → 250 → 2500 → 25000 → 250000 → 2500000. Since we moved the decimal point 6 places, the exponent will be 6.
Putting it all together, 2.5 million can be written as:
2.5 × 106