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Mathematics 10 Online
OpenStudy (anonymous):

Find the average value of y=sqrt(64-x^2) on its domain.

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?

OpenStudy (kc_kennylau):

No, it's \(-8\le x\le8\)

OpenStudy (anonymous):

Thank you. Now I can take the integral.

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