Explanation :
Scientific notation is the form of writing a very large or very small number in a simplest way.
Any number in scientific notation is written in the following form :
\(a\times 10^b\)
Where,
a is the coefficient of real numbers
b is any integer
In the given question, the number is given as \(0.000681\)
So, in scientific notation it is written as \(6.81\times 10^{-4}\)
Hence, this is the required solution.
