I HAVE a QUESTION, Can you pass 7th grade with 3 d's 2 F's?

Asap 25 pts + brainlest to right/best answer

What situation is an example of an observational study

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?