35. Which of the following is not hyperbola?

a. x^2+2y^2-1=0

b. x^2-y^2-1=0

c.x^2-y^2+1=0

36. Determine the area bounded by y=x^3 and y=x^4 over the interval (-1,1)?

38. find the volume of the solid obtained by rotation about x axis , the region bounded by y=1-x^2, and y=0?

39. Determine the area bounded by x=e^y and x=-4y over the interval y(0,2))?

40. Use the Dish/Washer method to find the volume of the solid generated by rotating about the y-axis the region bounded by f(x)= squre root x+9 ,x-axis, andy-axis.?