Help me! Im having trouble if you can please answer and give an explanation! The best one will get brainlist!

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median amount spent? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =