Find the Area A $31.416 \mathrm { ft } ^ { 2 }$

Multiple Choice

Find the area A. Round the answer to three decimal places.
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A) $31.416 \mathrm { ft } ^ { 2 }$
B) $62.832 \mathrm { ft } ^ { 2 }$
C) $20 \mathrm { ft } ^ { 2 }$
D) $3.142 \mathrm { ft } ^ { 2 }$