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with this plzz if yhu dont ion tripping

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?

Someone . me. compound probability

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?