Find the geometric mean of 125 and 5.

How do you find the area of this triangle.

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?

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )