this is a precal quiz i have to take but i have no idea how to do it. could anyone please slove them and show work. Thank you!

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?