Question

A scientist is working with 9 meters of gold wire. How long is the wire in millimeters?

Be sure to include the correct unit in your answer.

Answer 1

The length of the wire in millimeters is 9 × 10² mm.

Explanation:

1 meter is equal to 1000 millimeters. This is the ratio that we use to convert a length in meters to one in millimeters.

0.9 m × (1000 mm/ 1 m) = 900 mm = 9 × 10² mm (we round off to 1 significant figure)