What fraction of juniors preferred diagonal tops

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6