SOLUTION: I'm having trouble, I have to find the new area of a circle. The original area is 417 but I don't know the radius, how do I find the radius so I can triple it and find what the ne

Algebra ->  Circles -> SOLUTION: I'm having trouble, I have to find the new area of a circle. The original area is 417 but I don't know the radius, how do I find the radius so I can triple it and find what the ne      Log On


   

Question 896779: I'm having trouble, I have to find the new area of a circle.
The original area is 417 but I don't know the radius, how do I find the radius so I can triple it and find what the new area is?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I have to find the new area of a circle.
The original area is 417 but I don't know the radius, how do I find the radius so I can triple it and find what the new area is?
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Area+=+pi%2Ar%5E2+=+417
r+=+sqrt%28417%2Fpi%29
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You can solve for r, the triple it, then find the area.
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r+=+3%2Asqrt%28417%2Fpi%29
Area+=+pi%2A%283sqrt%28417%2Fpi%29%29%5E2+=+9%2A417
New area = 3753
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Multiplying the radius by x --> x^2 times the area