If your in a living room and you pass away did you die or are you just knocked out, why is a pizza box a square if the pizza is a circle and the slices are triangles, how can a sponge hold water if it’s filled with HOLES Here are just some free points.

If the person dies at home unexpectedly without hospice care, call 911. Have in hand a do-not-resuscitate document if it exists. Without one, paramedics will generally start emergency procedures and, except where permitted to pronounce death, take the person to an emergency room for a doctor to make the declaration.

Pizza is easier to make round rather than any other shape. And pizza boxes are easier and cheaper to make square than circular. It's cut into triangles as that is the natural way to divide a circle.

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.

go on the tube you might find some information there