What is the measure, in degrees, of

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?

Which fraction below is equivalent to 10/12?

Franco wants to double the volume of the cone. what should he do?