This circle is centered at the origin, and the length of its radius is 10. What is the circle's equation?
10
5
5
A. x10 + y10 = 100
B. X+ y = 10
O C. x2 + y2 = 10
O D. x2 + y2 = 100

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.