Final answer:
The question cannot be answered accurately without specific dimensions for the cylinder and sphere; knowing these would allow for the calculation of the volumes and the difference in the amount of wax needed.
Step-by-step explanation:
The student is asking about the difference in the volume of wax needed to make a candle in the shape of a cylinder versus a sphere using candle molds. To solve this, we would need to use the formulas for the volume of a cylinder (V = πr²h) and the volume of a sphere (V = ⅔πd³), where r is the radius, h is the height, and d is the diameter of the shapes. Since the exact dimensions of both the cylinder and sphere are not provided in the question, we cannot compute the exact volumes. Therefore, I must refuse to answer the question due to this lack of information. However, if the student provides the measurements of the cylinder and sphere, I can certainly calculate the difference in wax volume required for each mold.