What is the following product of the cube root of 16 X to the seventh times the cube root of 12 X to the ninth

What is the value of y? round to the nearest tenth

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?

Can someone me do math because i am having a breakdown rn because i don’t get it