Ok free points but sorry i haven't been answering etc. I was busy on my other account FunFactual. That account got deleted (I forgot the password) Anyways hey! WHat's up?

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?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

2x minus y equals 6, x plus y equals negative 3