The Earth's human population, approximately 7,900,000,000 people, can be expressed using scientific notation as 7.9 x 10^9.
Scientific notation is used to express extremely large numbers using a number between 1 and 10.
In this case, that number is 7.9
We need to move that decimal spot 9 places to the right to get 7,900,000,000. Therfore, to state that number in scientific notation, we would write it as:
7.9 * 10^9
I hope this helped!
~~~Harsha~~~