# How do you write 159840 in scientific notation?

Jun 25, 2018

$1.5984 \cdot {10}^{5}$

#### Explanation:

The key realization is that when we write numbers in scientific notation, we want one non-zero digit before the decimal point.

In our example, we need the decimal to be after the $1$, so we must loop it $5$ times to the left.

The $5$ will be our power of $10$, and since we looped the decimal left, the exponent will be positive. We get

$1.5984 \cdot {10}^{5}$

Hope this helps!