# How do you write 0.0021 in scientific notation?

Jun 12, 2018

color(maroon)(=> 2.1 * 10^-3 is the scientific notation.

#### Explanation:

$0.0021$

$\implies 0.0021 \cdot \frac{10000}{10000}$

$\implies \frac{21}{10000}$

$\implies \frac{2.1 \cdot \cancel{10}}{1000 \cancel{0}}$

$\implies \frac{2.1}{1000}$

$\implies \frac{2.1}{10} ^ 3$

color(maroon)(=> 2.1 * 10^-3 is the scientific notation.