x1xofxaxkndx
A(r) is an area function for a circle. Find A(3) when A(r) = 3.14r2^2



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Write it using the Equation editor.

x1xofxaxkndx
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dw:1355756501667:dw

x1xofxaxkndx
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ooooo

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A(3) = 3.14(3)^2
Can you finish it?

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that is it

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3.14 x 9 = ?

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28.26

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A(3) = 28.26

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^ Final answer.

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You basically replace the variables with the number for the function.