Answer:
![\huge\boxed{3 \ significant \ figures}](https://img.qammunity.org/2021/formulas/biology/high-school/thf9a56qvkn06hmumtfxh1ykd257hombpk.png)
Step-by-step explanation:
There are 3 significant figures in
2 0 . 8
According to the rules of significant figures:
=> All non-zero digits are significant.
=> Zeroes that come between 2 non-zero digits are also significant.
So, 3 significant figures in the term 20.8 cm.