What is the value of x 39 (2x+1)

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 function show two sisters' savings account and the rate at which they plan to deposit money

Which is the focus of a parabola with equation y2=4x