All else being equal, a study with which of the following error ranges would be the most reliable? a.) +/- 12 b.) +/- 6 c.) +/- 3 d.) +/- 9

i am chris from the united states i have skill in math and i am here to evryone

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.