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Mathematics, 20.10.2020 14:01 gui00g7888888888888

You need a 55% alcohol solution. On hand, you have a 90 mL of a 20% alcohol mixture. You also have 70% alcohol mixture. How much of the 70% mixture will you need to add to obtain the desired solution?

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You need a 55% alcohol solution. On hand, you have a 90 mL of a 20% alcohol mixture. You also have 7...
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