What is the value of y (angles)

Which of the following graphs represents the function f(x) = 2^x

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?