A liquid sample has a reported volume of 810 mL. A. What is the implied +/- error of this measurement? And, identify the certain digits and the uncertain digits in the measurement.

B. If the volume was instead able to be reported as 810. mL, what would be the implied +/-error? And, identify the certain and uncertain digits.

C. Which of the two volumes 810 mL or 810. mL is more precise? What would have to change to allow the reported volume to be written as 810. mL instead of 810 mL?