The area of circle A is 9 times the area of circle B. What is the ratio of the diameter of circle A to the diameter of circle B?
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Step-by-step explanation:
The area of circle A = a1
The area of circle B = a2
A₁ = 9A₂ (A = πR² in terms of diameter is R=2d
A = π(2d)²)
A₁/A₂ = 9
(d₁/d₂)² = 9
d₁/d₂ = 3
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