* Sugar dissolves in water at a rate proportional to the amount still undissolved. If there were 70 kg of sugar present initially, and at the end of 4 hours only 30 kg is left, how many more hours will it take until 80 percent of the sugar is dissolved? ○ 2.6 hours O 7.6 hours O 5.9 hours O 3.6 hours

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A: Consider the given information.

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