What is the area of the circle in square units? Select ALL that apply.


[tex]a.)4 \pi[/tex]
[tex]b.)\pi8[/tex]
[tex]c.)16\pi[/tex]
[tex]d.)\pi4 {}^{2} [/tex]
[tex]e.) \: approximately \: 25[/tex]
[tex]f.) \: approximately \: 50[/tex]

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