What value does the 1 represent in the number 4105.8

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 ?

Which expression is equal to (f+g)(x)?

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?