-Answer :
[tex] \large \boxed{0.000000009}[/tex]
Solution :
Here we go :
[tex] \rightarrow9 \times 10 {}^{ - 9} [/tex]
[tex] \rightarrow \dfrac{9}{10 {}^{9} } [/tex]
[tex] \rightarrow \dfrac{9}{1000000000} [/tex]
[tex] \rightarrow0.000000009[/tex]
[tex] \bold{ \mathfrak{hope \: it \: helps \: you......}}[/tex]
