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OpenStudy (anonymous):
Find the average value of y=sqrt(64-x^2) on its domain.
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OpenStudy (kc_kennylau):
Find its domain first? :)
OpenStudy (anonymous):
How do I find that?
OpenStudy (kc_kennylau):
The thing inside a surd must be greater than 0
OpenStudy (kc_kennylau):
\[64-x^2\ge0\]
OpenStudy (anonymous):
So x is -8 and 8?
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OpenStudy (kc_kennylau):
No, it's \(-8\le x\le8\)
OpenStudy (anonymous):
Thank you. Now I can take the integral.
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