THXX TO THE PPL WHO HELPED ME WITH THE MATH QUESTIONS!!

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?