Chemistry 9th Edition

Reading the meniscus of each beaker, you find the first beaker to contain 2.9 mL of liquid and the second beaker to contain 0.28 mL of liquid. Adding the two values together, you get $2.9$ mL $+ 0.28$ mL $=3.18$ mL. However, since the first beaker's measurement is limited to one decimal place, the value representing the total amount of liquid cannot exceed 1 decimal place. Hence, the answer is $3.2$ mL.