Answer
$100000$
Work Step by Step
We know that $a_n=a_1r^{n-1}.$
where $r$=common ration (we can get this by dividing any two consecutive terms) and $a_1$= the first term
Here $a_1=0.1$ and $r=\frac{a_2}{a_1}=\dfrac{1}{0.1}=10$
Hence, here we have
$a_n=0.1(10)^{n-1}.$
Therefore $a_{7}=0.1(10)^{7-1}\\=100000.$