“∆ bun,” what does the symbol mean and what does acronym mean

This means a change in blood urea nitrogen.

Explanation:

The blood urea nitrogen level of a patient is a means of knowing how the kidneys or liver of the patient are working. When the urea nitrogen in the blood is below or beyond a certain level, it can be a sign of kidney or liver failure.

answer; i do believe that the correct answer is (b)

chuck around 35 cubic feet of dirt amount equivalent to the weight of the dirt of 700 pounds            

                            hope this