Steven is building a fin for his surfboard. In order to make the fin, he needs to know the value of x in the following diagram.
-15
30*
Use your knowledge of triangle angle relationships to find the value of x.

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

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?

Answer these questions showing your work plz