The rectangle x’s shown below is 8/3 of another(original) rectangle of x’s draw the original rectangle

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

What is the inverse of the function f(x)=4x+8

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8