For this case we have that the volume of the figure is composed of the volume of a prism and the volume of a pyramid:
The volume of the prism is given by:

Where:
: It is the area of the base
h: It's the height
Substituting:
The volume of the pyramid is given by:

Where:
It is the area of the base
h: It's the height
Substituting:

We add and we have:

ANswer:
Option D
Answer:
15
Step-by-step explanation:
Co-efficient = number multiplied by a variable
The only number multiplied by a variable is 15, therefore, it's the co-efficient.
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The answer is d, just find the equation and then plug in the first few numbers of copies and you’ll find the correct answer
mark me brainliest if the answer is correct, thank you in advance :)