If your net income (money after taxes) is $400 a month, then your net income in one year is: 12 x $400 = $4,800
Calculate 20% of your annual net income to find your safe debt load.
$4,800 x 20% = $960
So, you should never have more than $960 of debt outstanding.
Note: Housing debt (i. e., mortgage payments) should not be counted as part of the 20%, but
other debt should

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)