Final answer:
The sphereVolume method computes the volume of a sphere using the formula V = (4/3) π (r)^3, where r is a positive radius parameter. The method should throw an IllegalArgumentException if a non-positive radius is passed. The formula for the volume is different from that of the surface area, which is 4 π (r)^2.
Step-by-step explanation:
Method Specification for sphereVolume
The method sphereVolume takes a single parameter radius, which represents the radius of a sphere. The radius must be a positive double value. The method returns the volume of the sphere as a double value calculated using the formula:
V = (4/3) π (r)^3
Where V is the volume of the sphere and r is the radius. To ensure the computation is correct, the method should check if the radius is positive before proceeding with the calculation. If the radius is not positive, the method should throw an IllegalArgumentException.
Comparing the Sphere Volume Formula
Looking at the information provided, the formula for the volume of a sphere is correctly identified as V = (4/3) π (r)^3, whereas the formula 4 π (r)^2 represents the surface area of a sphere. Therefore, the formula commonly mentioned in the context of sphere volume is the one with the cubic term (r)^3, which multiplies the radius raised to the third power by (4/3) π.