Final answer:
The question lacks context, making it impossible to provide an accurate answer on how decreasing rBW affects the number of slices.
Step-by-step explanation:
The question seems to be lacking context and it is unclear what rBW refers to. Without knowing the full context, it is impossible to provide an accurate answer. Generally, rBW could refer to a term used in various fields, potentially involving frequencies, widths, or rates. However, the mention of number of slices and bands and spaces between them could imply a context related to imaging technology, such as MRI or CT scans, where slice thickness and image resolution might be relevant. Without additional information, providing an accurate answer about the effects of decreasing rBW on the number of slices is not feasible.