Answer:
The answer is a) 8.15
Step-by-step explanation:
Hi, when going to inform a volume from a graduated test tube it's important to read the medition at the bottom point of the valley form by the liquid (by effect of the capillarity).
If not, that will lead to wrong medition.
Also, each line between the 9 and the 8 represents 0.1 ml, so the medition is higher than 8.1 and lower than 8.2.
Due to the human eye precision and the degree of graduation of the tube it's not correct to asume specific values such as 0.13 or 0.135, becuase you can never know.
In conclusion, if the medition falls between to lines, it's correct to inform the half point.
For example, between:
- 8.1 and 8.2 → 8.15
- 7.4 and 7.5 →7.45
- 5.8 and 5.7 → 5.75