I need help on this assignment

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?

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

If the discriminant if a quadratic equation is 4 which statement describes the roots?