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At a plant that packages bottled spring water, the water is passed through a sequence of ...

At a plant that packages bottled spring water, the water is passed through a sequence of ion-exchange filters to reduce the sodium content prior to bottling. Each filter removes 70% of the sodium present in the water passing through it. Determine the number of filters that must be used to reduce the sodium concentration from 30 parts-per-million to 7.20 parts-per-million.

▸ 7 filters

▸ 6 filters

▸ 4 filters

▸ 5 filters

Textbook

Calculus: Early Transcendentals

Edition: 3^rd

Authors: Briggs, Cochran, Gillett, Schulz

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