41. Determine the vertices of 16x^2+9y^2-144=0?

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

43. Detemine the intersections of y=x^3 and y= squre root of x?

45. Use the Disk/Washer or Shell method to set up the integral to find the volume of the solid obtained by rotation about x=1 the region bounded by x=y^2-3 and x=1?

46. set up the integral with respect to dy for the arc length of y= sinx over the interval (-pie/2,pie/2)?