## Introductory Algebra for College Students (7th Edition)

$0.86$
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}