# [Solved] Maria is using a meter stick to determine the height of a door. If the smallest unit on the meter stick is centimeters, which measurement could Maria have used to most accurately record the height of the door?

**Maria is using a meter stick to determine the height of a door. If the smallest unit on the meter stick is centimeters, which measurement could Maria have used to most accurately record the height of the door? A. 2.309 m B. 2.3 m C. 2.31 m D. 2 m**

To determine the most accurate measurement Maria could have used with a meter stick that has centimeters as its smallest unit, we need to consider the number of decimal places that correspond to centimeters.

**Concept Used:** Precision and Decimal Places

1 meter = 100 centimeters. Therefore, 1 centimeter is represented as 0.01 meters. This means that the precision of the meter stick up to centimeters is two decimal places.

**Detailed Explanation:**

**1. Analyze the Given Options**

A. 2.309 m – This measurement is to three decimal places, which is more precise than the meter stick’s smallest unit of centimeters.

B. 2.3 m – This measurement is to one decimal place.

C. 2.31 m – This measurement is to two decimal places, which matches the precision of the meter stick’s smallest unit of centimeters.

D. 2 m – This measurement has no decimal places.

**2. Determine the Most Accurate Measurement**

Given the precision of the meter stick, the most accurate measurement Maria could have used to record the height of the door would be to two decimal places.

**Conclusion:** The most accurate measurement Maria could have used, given the precision of the meter stick, is: C. 2.31 m.