Need some help please :)

Simone claims the initial value and y-intercept are the same thing on a graph. Is she correct?

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

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?