Question

a block of wood is measured, as shown in the diagram below.
diagram of a ruler measuring a wooden block, with cm markings
what is the length of the wooden block in millimeters?

1. 2.60 mm
2. 26.0 mm (selected)
3. 260 mm
4. 2,600 mm

Explanation:

Step1: Read length in cm

The wooden block's length on the ruler is 2.60 cm (ends at 2.60 cm mark).

Step2: Convert cm to mm

Since 1 cm = 10 mm, multiply by 10: $2.60 \times 10 = 26.0$ mm.

Answer:

1. 26.0 mm