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Helium is pumped into a spherical balloon at a rate of 2 cubic feet per second. How fast is the radius increasing after 2 minutes?

Helium is pumped into a spherical balloon at a rate of 2 cubic feet per second. How fast is the radius increasing after 2 minutes? Note: The volume of a sphere is given by V - (4/3) mr3 Rate of change of radius (in feet per second) =

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