Are triangles def and lnm similar if df = 8 and lm = 4?

yes, by the sas similarity postulate
yes, by the definition of similarity
no, the corresponding sides are not proportional
no, there is not enough information

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 ?