Q. What is the greatest possible error for a measurement of 4 gallons?
Determine Precision: Determine the precision for the measurement of 4 gallons.Since the measurement is given as a whole number without any decimal or fractional parts, the precision is to the ones place.Precision: 1
Calculate Error: Calculate the greatest possible error based on the precision.The greatest possible error for a measurement is half of the unit of precision. Therefore, for a precision of 1 gallon, the greatest possible error is half a gallon.Greatest possible error = Precision / 2= 1/2= 0.5 gallons