If the scale factor between two circles is 7a/9b what is the ratio of their areas?
2 answers:
<span>. 49a2/81b2
I think the answer is B)</span>
Answer: The correct option is (B) 
Step-by-step explanation: Given that the scale factor between two circles is
.
We are to find the ratio of the areas of the two circles.
Let r and R be the radii of the two circles and A and B be the corresponding areas.
We know that the scale factor is the ratio of the radii of the two circles.
So, we have

Thus, the required ratio of the areas of the two circles is 
Option (B) is CORRECT.
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