The classic way to convey the error that exists in a measurement is a formula that shows the obtained measurement (X) as a sum of a true score plus some error. One version of this formula is: X = T + e. With this formula in mind, obtaining more precise measures depends on reducing error.
  Mega is the prefix meaning one million, therefore there are one million (1,000,000) gallons in a mega gallon.
There is no such thing as a cubic gallon. The term 'gallon' all by itself refers to a volume of space. 1 cubic foot = 1,728 cubic inches 1 gallon = 231 cubic inches â¦ 1 cubic foot = 7.481 gallons (rounded) 1 gallon = 0.13368 cubic foot (rounded)