Question 185682
A circle witht the radius x-2 produces an area of 169pi cm^2  2. Find x. 
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r = x-2 cm
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Area = (pi)(x-2)^2
169pi = pi(x-2)^2
(x-2)^2 = 169
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x-2 = 13 or x-2 = -13
Positive solution:
radius = 13 cm
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Cheers,
Stan H.