Final answer:
The expression that represents the width of the rectangle is 1.25 cm, reported to three significant figures.
Step-by-step explanation:
The expression that represents the width of the rectangle is 1.25 cm.
Based on the given information, the rectangle is at least 1.0 cm wide but not 2.0 cm wide, so the first significant digit is 1. The width of the rectangle is past the second tick mark but not the third, which represents 0.1 each. To estimate the next place, we consider it to be about halfway between 0.2 and 0.3, so we estimate it as 0.5. Therefore, the measured width of the rectangle is 1.25 cm, reported to three significant figures.