I need to find the slope please help ASAP!!

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

Louis wants to carpet the rectangular floor of his basement the basement has an area of 864 square feet the width of the basement is 2/3 its length what is the length of lewis's basement

To decrease an amount by 16% what single multiplier would you use