HELP- Mara adds 4 tablespoons of water to the sand, 7 tablespoons to the gravel, and 5 tablespoons to the
Calculate the porosity of each of Mara's samples using this formula, and record the results in the char
% porosity = (amount of water added to sample = total sample volume) x 100
"Total sample volume" is the amount of soil, sand, or gravel. A half cup is equal to 8 tablespoons.