Please help I will give you brainliest as well as 20 points!

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?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Which of the following is an equation of a line parallel to the equation y=4x+1?