SOLUTION: What is the lenght of a diameter of the circle when the area of the circle is represented by 16pi

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Question 838818: What is the lenght of a diameter of the circle when the area of the circle is represented by 16pi
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi,



A+=+pi%2Ar%5E2+=+16pi

     r%5E2+=+16, r = 4 (Using only the positive root for unit measure)