calculating the volume of an irregular solid\nuse the image to determine the volume of the rock.\ninitial…

Explanation:

Step1: Identify initial volume

The initial volume of water in the graduated - cylinder is 20 mL.

Step2: Identify final volume

The final volume of water and the rock in the graduated - cylinder is 30 mL.

Step3: Calculate volume of rock

The volume of the rock is equal to the difference between the final and initial volumes. $V = 30 - 20=10$ mL. Since 1 mL = 1 $cm^{3}$, the volume of the rock is 10 $cm^{3}$.

Answer:

Initial volume: 20 mL Final volume: 30 mL Volume of rock: 10 $cm^{3}$