A beach ball is a sphere with a diameter of 10 inches. Which value is closest to the volume in cubic inches of the beach ball

Well the formula to find a volume of a sphere is volume equal 4/3 time pie times radius to the third degree. So 4/3✖️pie ✖️5 to third degree which is 523.6. I get the number five by dividing 10 which is diameter over 2. Formula for diameter is d equal 2r ( r is radius). so answer is 524 cubic inches