algebra
posted by katy
Solve the formula for the variable given.Then use the given information to find the value of the variable.
A=2πrw
Find r if w=4ft
And A=120ft square.
Please someone help me with this!!!

Reiny
just 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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