Question

how do you write 780,000 in scientific notation? × 10

Explanation:

Step1: Move decimal point

Move the decimal point in 780000 to the left until there is only one non - zero digit to the left of the decimal point. We get 7.8.

Step2: Count number of places

We moved the decimal point 5 places to the left. In scientific notation, a number is written as $a\times10^{n}$, where $1\leqslant a<10$ and $n$ is an integer. Here, $a = 7.8$ and $n=5$.

Answer:

$7.8\times 10^{5}$