Question

making measurements
consider the following thermometer, and use it to answer the question.
the calibration of this thermometer is 1°c, which informs us to record the temperature measurement to the tenths place (on °c)
how should you record the temperature measurement for this thermometer?
30.01°c
31.0°c
29°c
31°c

Explanation:

Step1: Determine the scale division

Looking at the thermometer, between 20 and 30 (or 10 and 20, etc.), we can see the markings. Let's check the intervals. From the visible markings, between 20 and 30, how many divisions? Wait, actually, looking at the thermometer, the major marks are at 10, 20, 30. Let's see the minor divisions. Wait, the liquid level is at a position. Wait, the options: let's analyze the precision. The calibration is to the tenths place? Wait, no, the problem says "record the temperature measurement to the tenths place (on °C)". Wait, looking at the thermometer, the scale: let's see, between 20 and 30, how many small divisions? Wait, maybe each major division (10°C) is divided into 10 small divisions? Wait, no, looking at the image, the thermometer has marks. Wait, the red liquid is at a level. Wait, the options: 31.0°C, 30.01, 29, 31. Wait, let's check the position. Wait, the major mark at 30, and the liquid is at 31? No, wait, maybe the scale: let's see, the numbers are 10, 20, 30. Let's count the lines. Wait, between 20 and 30, how many lines? Wait, maybe each major division (10°C) has 10 minor divisions, so each minor division is 1°C? No, that can't be. Wait, no, maybe the precision. Wait, the problem says "record to the tenths place". Wait, maybe the thermometer's scale: let's see, the liquid is at 31.0? Wait, no, wait the options. Wait, the correct way: when reading a thermometer, we estimate to one decimal place (tenths) if the scale allows. Wait, looking at the thermometer, the red liquid is at 31.0? Wait, no, maybe the position is at 31.0? Wait, no, let's check the options. Wait, the options are 30.01, 31.0, 29, 31. Wait, 31.0 has one decimal place, which is tenths. Let's see: the thermometer's scale, if the major marks are 10,20,30, and between them, maybe each 10°C is divided into 10 parts, so each part is 1°C? No, that would be whole numbers. But the problem says "tenths place", so maybe the scale is such that each major division (10°C) is divided into 100 parts? No, that's too much. Wait, maybe the image: the red liquid is at 31.0? Wait, no, maybe I made a mistake. Wait, the correct answer is 31.0°C? Wait, no, wait the liquid level: let's see, the thermometer's scale. Wait, the numbers are 10,20,30. Let's look at the position of the red liquid. Wait, maybe the liquid is at 31.0? Wait, the options: 31.0°C is a possible answer because it's to the tenths place. Let's check: 31.0 has one decimal, which is tenths. 30.01 is hundredths, 29 is whole, 31 is whole. So the correct one is 31.0°C? Wait, no, wait maybe the liquid is at 31.0? Wait, maybe the thermometer's scale: let's see, the red liquid is at 31.0. So the answer is 31.0°C.

Step2: Confirm the precision

The problem states to record to the tenths place, so the measurement should have one decimal digit. Among the options, 31.0°C has one decimal (tenths place), while 30.01 is hundredths, 29 and 31 are whole numbers. So 31.0°C is the correct recording as it's to the tenths place.

Answer:

31.0°C