Answer
$0.86$
Work Step by Step
Since the exponent of $10^{
-1
}$ is $\text{
negative }
1
,$ move the decimal point $
1
$ place to the $\text{
left
}.$ Hence, the given expression, $
8.6
\times10^{-1}
,$ is equivalent to
\begin{array}{l}\require{cancel}
0.86
.\end{array}