What is the answer? Please? i will give 11 points for this one.

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Ineed to know the answer to this algebra question.