x^4 and y = sin x. Solving a^4 = sina with the calculator, we find a =
0.9496.(b) Elements of volume are triangular prisms with height h = 3 and base
b = (sinx − x^4 ), as shown below.(c) When R is rotated around the x-axis, the element generates washers. If
r 1 and r 2 are the radii of the larger and smaller disks, respectively, thenThe figure above shows an elliptical cross section of the tank. Its