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OpenStudy (anonymous):
If a spherical ball is enlarged so that its surface area is 9 times greater than its original surface area, then the original radius was multiplied by....?
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OpenStudy (anonymous):
i think 3
OpenStudy (oaktree):
Yeah, because the radius is squared.
OpenStudy (anonymous):
because S=k*r²
OpenStudy (anonymous):
thank you! :)
OpenStudy (anonymous):
rw
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