Simplify each expression, Help plz

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?

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.