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Mathematics, 26.07.2019 01:00 thedocgalloway

Acompany manufactures exercise balls for gyms. type a is a spherical ball with a radius of 12 inches. type b is a hemisphere that will remain stationary when placed on its base. the radius of the hemisphere is also 12 inches. what is the ratio of the surface area of the sphere to the surface area of the hemisphere?

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