Which of the following is not a rate?

What is the quadric regression equation that fits these data

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.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?