Question

1. record the measurements to the correct number of significant figures.

Explanation:

Step1: Analyze first graduated cylinder

The scale has marks at 50 and 60, so each major division is 10. There are 10 minor divisions between them, so each minor division is $\frac{10}{10}=1$. The meniscus is at 56.

Step2: Analyze second graduated cylinder

The scale has marks at 3 and 4, so each major division is 1. There are 10 minor divisions between them, so each minor division is $\frac{1}{10}=0.1$. The meniscus is at 4.2.

Step3: Analyze third graduated cylinder

The scale has marks at 20 and 30, so each major division is 10. There are 10 minor divisions between them, so each minor division is $\frac{10}{10}=1$. The meniscus is at 26.

Answer:

First cylinder: 56
Second cylinder: 4.2
Third cylinder: 26