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8th grade math

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circle A has a raduis that is twice the length og the raduis of circle B.

Which is an accurate statement about the relationship of these areas of circle A and B and y?

a.the area of circle A is 4 times the area of circle B
b. the area of circle A is twice the area of circle B.
c.the area of circle A is onehalf the area of circle B
d.the area of circle A is one forth the area of circle B

  • 8th grade math - ,

    A = 3.14*r^2.

    A = 3.14*(2r)^2 = 3.14*4r^2.
    So the answer is a.

  • 8th grade math - ,

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