M40 only 13-17 are allowed and I’m very sus

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Select a graph that have an equation with a < 0

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.