Container A is cylinder with a radius of 10 units and a height of 10 units. A right cone has been carved from its base and has a height of 10 units. Container B has the same radius as container A. Which statement derives the formula to find the volume of container B?

container A is a right cylinder that has had a right cone subtracted from its base, container B is half of a sphere

1 over 3π(102)(10) − π (102)(10)
2[1 over 3π(102)(10) − π(102)(10)]
π(102)(10) − 1 over 3π(102)(10)
2[π(102)(10) − 1 over 3π(102)(10)]