What happens when light strikes a transparent object

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 (monthly car loan payment per $1,000 borrowed) i need !

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?