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Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

The sum of two numbers is 86, and their difference is 20. find the two numbers

Which graph represents the linear function below? y-4= (4/3)(x-2)