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Substance A decomposes at a rate proportional to the amount of A present. It is found...

Substance A decomposes at a rate proportional to the amount of A present. It is found that 88 lb of A will reduce to 44 lb in 4.74.7 hr. After how long will there be only 1 lb​ left?

There will be 1 lb left after ____hr.
(Do not round until the final answer. Then round to the nearest whole number as​ needed.)

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