Answer:
7a-12
Step-by-step explanation:
explanation is in the pic.
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Answer:
idc
Step-by-step explanation:
Answer:
or 
Step-by-step explanation:
The volume of a cylinder is calculated by the following formula

Where r is the radius of the cylinder and h is the height
In this case we know that the radius r of the base is:

and

So the Volume is:



Hello,
the answer will be the last one
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hope this help