3,868,000,000 in scientific notation

3,868,000,000 in scientific notation would be 3.868 * 10^9

In order to get it into scientific notation, the first number and only the first number can be in front of the decimal. That would make it:

3.868 times ten to some power. If you move the decimal of the original number to the left nine places, you get this number. That means that the final number is:

3.868x10^9

The nine is for the number of decimal places you moved to the left.