Which situation is best represented by the equation below? x - 30.83 = 85.73

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?

How many verticies does a triangular prims have

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?