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# A spherical water tank has a diameter of 42 feet. How much water can the tank hold when full? A) 10,561π cubic feet B) 12,348π cubic feet C) 15,934π cubic feet D) 21,568π cubic feet

We know that the radius is 21 by dividing the diameter by half volume of a sphere is v = $\frac{4}{3} \pi r^3$ $v= \frac{4}{3} \pi 21^3=12,348[latex] \pi$ [/latex] Answer is B