Can somebody help with this? You don’t have to answer all the questions but at least some

What is the measure of x, in degrees

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

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.