Help and please try to explain!! A fortress is garrisoned by 5,200 men; and there are 9 times as many infantry, and 3 times as many artillery, as cavalry. How many are there of each?

Millie decided to purchase a $17,000 msrp vehicle at a 4% interest rate for 6 years. the dealership offered her a $2700 cash-back incentive, which she accepted. if she takes all these factors into consideration, what monthly payment amount can she expect? a.$223.73b.$243.25c.$274.61d.$235.51