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OpenStudy (anonymous):
This might be a really stupid and easy question but, I don't know what to do... What is the radius of the circle whose equation is x^2 + y^2 = 9? a) 3 b) 9 c) 81
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OpenStudy (nory):
On the right side is 9.
OpenStudy (nory):
You have to take the square root of 9. What is √9?
OpenStudy (anonymous):
3
OpenStudy (nory):
That is the radius of the circle. Easy as pi.
OpenStudy (nory):
Does that make sense?
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OpenStudy (anonymous):
yes, thank you!
OpenStudy (nory):
No problem. :)
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