Question

The hardness of a steel nail is about 5.5 a certain mineral scratches a steel nail but does not scratch quartz. What could the hardness of mineral be

Answer 1

What are the rest of the options under the question?

Answer 2

Pick any answer between 5.5 and 7. If you have 6 choose it.

Step-by-step explanation:

Quartz has a hardness of 7.

The steel ball is 5.5

The mineral must be between these two values. Written mathematically

5.5 < x < 7

So pick any value that is between 5.5 and 7. The other choices would be valuable.