Smamantha deposits ＄300 in a bank account thats earns an annual rate of 2.5%.after 9months, she computes the simple interest what is the correct amount of simple interest after 9 months

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.