The approximate volume of glass used to make the ball is 1620.2 cm³.
What is the volume of a sphere?
The volume of a sphere is = 4/3 × π × r³.
Where, r is the radius of the sphere.
Given, crystal ball is 3 cm thick and the radius of the outer surface of it is = 8 cm.
Therefore, the radius of the inner surface of the sphere = (8 - 3) cm = 5 cm.
Hence, the volume of the glass = (4/3 × π × 8³ - 4/3 × π × 5³) cm³
= 4/3 × π × (8³ - 5³) cm³ = 4/3 × π × (512 - 125) cm³ = 4/3 × π × 387 cm³
= 1620.2 cm³.
Learn more about the volume of a sphere: https://brainly.com/question/11374994
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