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Answer :

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]