Find the volume v of the described solid s. the base of s is the region enclosed by the parabola y = 9 − 9x2 and the x-axis. cross-sections perpendicular to the x-axis are isosceles triangles wi

Find the volume v of the described solid s. the base of s is the region enclosed by the parabola y = 9 − 9x2 and the x-axis. cross-sections perpendicular to the x-axis are isosceles triangles with height equal to the base.