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28-06-2017
Mathematics

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What is the radius of a circle whose equation is x2 + (y – 8)2 = 25?

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28-06-2017

The formula for a circle is (x - h)^2 + (y - k)^2 = r^2
Where (h, k) is the center and r is the radius.
x^2 + (y - 8)^2 = 25
25 = r^2
So the radius is sqrt 25 or 5.
Radius = 5

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