Answer:
[tex]0.21\ m[/tex]
Step-by-step explanation:
Let's set up a unit converter:
(Please note that 1 m = 100 cm OR 1 cm = [tex]10^{-2}[/tex] m)
[tex]21\ cm(\frac{10^-2\ m}{1\ cm})[/tex]
The "cm" cancel out leaving us with:
[tex]21*10^{-2}\ m=0.21\ m[/tex]
