# As of the year 2000, the Earth's population was estimated to be 6,200,000,000. How do you write this number using scientific notation?

Jan 9, 2017

We need to move the decimal point 9 places to the left so the exponent for the 10s term will be positive:

$6 \textcolor{red}{, 200 , 000 , 000} = 6.2 \times {10}^{9}$