Which is the correct simplified form of the expression x^1/2y^-1/3/x^1/4y^1/2

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?

If f(x)= 3x+6 which of the following is the inverse of f(x)

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x