Find the Formula for the Function $A = 2 \pi r$

question 55

Multiple Choice

Find the formula for the function.
-Express the area of a circle as a function of its radius r.

• A) \(A = 2 \pi r\)
• B) \(A = \pi r ^ { 2 }\)
• C) \(\mathrm { A } = \pi \mathrm { r }\)
• D) \(A = \pi r ^ { 3 }\)

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