Simplify the equation. [tex]\frac{x}{x-4} + \frac{4}{x-4}

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?

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

How do you solve a question like this?