Using proportions, it is found that Demarco needs 4 tiles.
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Thus, the rule of three is given by:
1 tile - 0.5 ft
x tiles - 2 ft
Applying cross multiplication:
[tex]0.5x = 2[/tex]
[tex]x = \frac{2}{0.5}[/tex]
[tex]x = 4[/tex]
Thus, Demarco needs 4 tiles.
A similar problem is given at https://brainly.com/question/23536327