Please help, I do not understand this

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 graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

The function models the number of accidents per 50 million miles driven as a function