How do you write four million, six hundred five thousand in standard form

If you are just building your payment history, how many points from a perfect score will you possibly miss?

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 ?

What percent of 18 is 24? and plz explain thx.