Find the lcm of each pair of numbers 6 and 10

What is the product of the radical expression. (7-2square root) (8+2 square root)

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

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?