Question

The area of a circle is a function equal to the product of pi (pi) and the square of the radius (r). Which of the following shows this function?

A
ƒ(r) = pir2

B
ƒ(r) = 2pir

C
ƒ(r) = 2pi + 2r2

D
ƒ(r) = pi2 – r2

Answer 1

\[\pi r ^{2}\]
A

Answer 2

A is the correct answer

Answer 3

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