Transcribed Image Text: A toy is made up of cylindrical rings stacked on a base, as shown in the diagram. The diameter of Ring 1 is 90% of the diameter of the base. For Ring 2
through Ring 7, the diameter of each ring is 90% of the diameter of the ring directly below it.
The diameter of the base is 6 inches, Which function can be used to find the diameter in inches of Ring r, where 1