ANSWER:
2999, 4 significant figures
STEP-BY-STEP EXPLANATION:
We have the following:
[tex]\begin{gathered} 2999-0.1=2998.9 \\ 2998.9\cong2999\rightarrow Decimals\colon0 \end{gathered}[/tex]Therefore, we can determine that in total there are 4 significant figures
