Answer:
Shale.
Explanation:
It is composed of silt or clay that has been compacted or squeezed together to form a solid rock.
Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
If a country is landlocked, its literally surrounded by land.That would be physical<span />
Answer:
The correct answer is - 20.
Explanation:
According to the triangle inequality theorem states that the largest and smallest value of the third side of the triangle can be found with the other two sides. The lowest value would be more than the difference of the other two sides and the largest value would be less than the sum of the other two sides of the triangle.
In this case, the other two sides are - 9 and 12
suppose the third side is - x
Then according to the triangle inequality theorem, the largest value of x would be:
x< 12+9
x< 21
so the x would be less than the 21 which is - 20.
