1) What is the formula for calculating the volume of a sphere? a) V = (4/3)πr b) V = (4/3)πr^2 c) V= 4/3 π r3 d) V = πr^2 2) What happens to the volume of a sphere if its radius is doubled? a) It increases by a factor of 2 b) It increases by a factor of 4 c) It increases by a factor of 8 d) It increases by a factor of 16 3) If the radius of a sphere is 5 units, what is its volume? a) 125π cubic units b) 500 cubic units c) 100π cubic units d) 625 cubic units

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