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Steven cleans his aquarium by replacing 2/3 or the water with new water, but that doesn’t clean the aquarium to his satisfaction. He decides to repeat the process, again replacing 2/3 of the water with new water. How many times will Steven have to do this so that at least 95% of the water is new water?

Help as quickly as possible!!!

User Caseynolan
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Steven will have to repeat the process three times so that at least 95% of the water is new water
User Lng
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