Help please i need this rn if possible

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?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

With finding limits of multi variable !