Please help me

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Which of the following are accepted without proof in a logical system? check all that apply.