Ronald and tim both did their laundry today ronald does laundry every 6 days and tim does laundry every nine days how many days will it be until ronald and tim both do laundry on the same day again

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 i need !