The maximum number of roots to a polynomial of order n is n roots. Take the example of a quadratic (order 2) which can intersect the x-axis a maximum of 2 times, and similarly a cubic (order 3) 3 times maximum.
Hence for 8 intersections, minimum order = 8
It depends on the weather but ill go with the second one. U dont have to take my advice tho.
Part A would be $75+.$55m and part B would be $165 +$75=$240
A=(3+y)/x^2
Hope this helps