Chapter 5 - Section 5.7 - Negative Exponents and Scientific Notation - Exercise Set - Page 409: 102

$1.03\times10^{-6}$

Using $a\times10^n$, where $1\le a\le9,$ and $n$ is an integer, the scientific notation of the given expression, $ 0.00000103 ,$ is \begin{array}{l}\require{cancel} 1.03 \div1,000,000 \\\\= 1.03\times10^{-6} .\end{array}