1) Find the volume of the solid whose base is the region bounded by the x-axis and the semicircle y=sqrt(1-x^2) and which has the property that each cross section perpendicular to the x-axis is a square
2) Find the volume of the solid whose base is the region bounded by the x
-axis, the curve y=sqrt(x^2+9) x=1 and x=2 and which has the property that each cross section perpendicular to the x-axis is an equilateral triangle.
3) Find the volume of the solid whose base is the region bounded by the x-axis, the curves y=5x, y=3x2, x=0 and x=1.66667and which has the property that each cross section perpendicular to the x-axis is an equilateral triangle.
4) Find the volume of the solid obtained by rotating the region enclosed by
x=4y,y3=x,y≥0