I need help I will give you heart and everything 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?

Need on this one asap im almost done with this subject

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)