Answer
$0.0215$
Work Step by Step
Since the exponent of $10^{
-2
}$ is $\text{
negative }
2
,$ move the decimal point $
2
$ places to the $\text{
left
}.$ Hence, the given expression, $
2.15
\times10^{-2}
,$ is equivalent to
\begin{array}{l}\require{cancel}
0.0215
.\end{array}