26. Given that the growth rate constant of certain populaion is 8% How long does it take to triple its population?

27. Find the area abounded by x=y^2-y and x=2y+18?

30. Use the Disk/Washer method to set up the integral to find the volume of the solid obtained by rotation about the y-axis the region bounded by the curves y= squre root of x-2, y=0 ,x=5?

33. Certain chemical materials remains 10% in 5 years Determine its half-life.?

34. Determine the intersections of y=x^3 and y=3 squre root x?