Need help insane questions :((( i hate math lol

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Is the figure congruent? yes or no?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.