Apopulation of 75 foxes in a wildlife preserve quadriples in size every 15 years. the function y=75x4x where x is the number of 15-years, models the population growth. how many foxes will there be after 45 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.