Question

question 9
which of the following are quantitative observations?
the age of a person
the height of a tree
the color of someones eyes
the smell of a substance

Explanation:

Quantitative observations involve numerical measurements. The age of a person (e.g., 25 years) and the height of a tree (e.g., 10 meters) are numerical. The color of eyes and smell of a substance are qualitative (descriptive, non - numerical).

Answer:

The age of a person, The height of a tree