Please help ! Please

Which of the following can be used to explain a statement in a geometric proof?

Melissa is purchasing a $160,000 home and her bank is offering her a 30-year mortgage at a 4.9% interest rate. in order to lower her monthly payment, melissa will make a 20% down payment and will purchase 3 points. what will her monthly mortgage payment be? a. $645.98 b. $650.46 c. $662.93 d. $606.69

How much is $1200 worth at the end of1 year, if the interest rate is 5.5% is compounded quarterly.