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Source: Manhattan

Level: 3

Four concentric circles share the same center. The smallest circle has a radius of 1 inch. For n greater than 1, the area of the nth smallest circle in square inches, , is given by What is the sum of the areas of the four circles, divided by the sum of their circumferences, in inches?

  • A 1
  • B
  • C 2
  • D
  • E 3

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