A right triangular prism has a leteral edge 12cm long. if the base triangle has sides 4,5 and 3cm long. find its lateral surface area and volume​

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!