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OpenStudy (anonymous):
thanks
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OpenStudy (anonymous):
Area of a sphere is 4*PI*r^2 area of a circle is PI*r^2 A=2*PI*r^2+PI*r^2=3*PI*r^2
OpenStudy (anonymous):
3*PI*r^2, with r=4cm
OpenStudy (anonymous):
your welcome
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