The figure shows a final volume reading of a serological pipet. First determine the value of

each increment, and then read the level of the liquid. Which of the following is closest to

what you would record for this measurement, to the correct number of significant figures?

$($Hint: students estimate one decimal place past the lowest marked increment$)$

$39\mathrm{.}2mL$

$39\mathrm{.}23mL$

$39\mathrm{.}18mL$

$40\mathrm{.}77mL$