The porosity of the gravel sample is 28.75%
We have to determine.
What is the porosity of the gravel sample?
<h3>The porosity of the gravel sample;</h3>
Porosity is the term which is defined as the volume of voids present in the soil to the total volume of the soil.
The formula used to calculate the Porosity is;

A sponge is a case of a permeable fabric because it incorporates a huge number of purge spaces compared to its volume.
Porosity is the property of a question that communicates the entire volume of purge or pore space within the material.
Hence, the porosity of the gravel sample is 28.75%
Learn more about "porosity" :
brainly.com/question/2593663
B.) 85
They are alternate interior angles so they are the same degree.
Answer:

Step-by-step explanation:
Since it's a perfect square, we can simply use the formula:

Given the perfect square expression
. Apply perfect square formula:

Knowing laws of exponent is mandatory when it comes to algebra. Recall that:

Apply laws of exponent to simplify the terms or expression:

Since there are no like-terms to do operation with (these terms have different degrees so they are not considered to be like-terms.) Therefore, the final answer is:
