Book cost 12.87 for 9kg how much does 1 kg cost to the nearest cent

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

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.