In the image, two circles are centered at a. the circle containing b was dilated to produce the circle containing b′. what is the scale factor of the dilation?

1

2

0.5

-0.5

To answer the question above as to the scale factor of the dilation  which in an image not provided, two circles are centered at A, The circle containing B was dilated to produce circle containing B'. The answer is number 1.

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It is 6% because if you subtract 69-58=6 so 6% is the answer to your question.