What is the LCD of 4/7 1/6

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?

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319