To report the measurements accurately with the proper number of significant figures based on how the rulers are marked:
Ruler A: Since ruler A shows the pencil at a little over 1 dm, the measurement can be reported as 1.1 dm. This indicates the measurement is between 1.0 and 1.2, assuming the precision is to the nearest tenth of a decimeter.
Ruler B: Ruler B shows the pencil at 1 1/3 dm, which is equivalent to 1.333... dm. However, for practical measurements, it's more appropriate to round this to two decimal places, which makes it 1.33 dm.
So, the final reported lengths are:
- Ruler A: 1.1 dm
- Ruler B: 1.33 dm