What is the rate of change of the amount earned with respect to hours worked for this function?

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 sentence as an equation. 6 fewer than the quantity 140 times j equals 104

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?