# How do you simplify and write (8.4 times 10^8) / (4 times 10^5) in scientific notation?

Mar 17, 2018

$2.1 \times {10}^{3}$

#### Explanation:

Divide

$\frac{8.4}{4} = 2.1$

Divide

${10}^{8} / {10}^{5} = {10}^{3}$

(When you divide in scientific notation, you subtract the exponents)

$= 2.1 \times {10}^{3}$