8.Set up the integral with resepect to dy or the arc length of y=x^3 over (1,2)?

9.Use the Shell method to set up the integral to find the volume of the solid obtained by rotation about the-axis, the region bounded by the curvesy=squre root of x-2 , y=0 and x=5?

10. use the Shell method to set up the integral to find the volume of the solid obtained by rotating about y=-1 the region bounded by y= x^2+1 , x=1 , the x-axis , and the y-axis?

11. Determine the vertices of 25x^2-9y^2+225=0?

12. Find the are bounded by f(x)=sinx and g(x)=cosx over the interval x(pie/4,5pie/4)?