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September 21, 2014

September 21, 2014

Posted by **katy** on Thursday, August 22, 2013 at 8:10pm.

A=2πrw

Find r if w=4ft

And A=120ft square.

Please someone help me with this!!!

- algebra -
**Reiny**, Thursday, August 22, 2013 at 8:47pmjust sub in your values

120 = 2π(r)(4)

120/( 8π) = r

button pushing time!

(I would punch in ...

120

÷

8

÷

π

=

to get appr. 4.775

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