Hey can someone help me ?Which graph shows a function whose inverse is also a function?

Show me how you find x and determine what x is you i appreciate it : )

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?