Find the values of x, the lengths of AB and BC

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

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?

Somone me i want to know what 18 hours out of 24 hours in a fraction