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Mathematics 7 Online
OpenStudy (anonymous):

find a(2) when a(r)=3.14r2

OpenStudy (amistre64):

let r = 2 ...

OpenStudy (anonymous):

put r=2

OpenStudy (anonymous):

then do the usual multiplication dear

OpenStudy (anonymous):

then: 3.14*2*2 = 12.56

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