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It looks like you're mentioning answers to a quiz or test on the volume of cylinders. However, without seeing the actual questions or problems associated with these answers, I cannot confirm if they are correct. For future reference, the volume of a cylinder is calculated using the formula:
\[ V = \pi r^2 h \]
Where:
- \( V \) is the volume,
- \( \pi \) is approximately 3.14159 (or you can use the π button on most calculators),
- \( r \) is the radius of the cylinder's base, and
- \( h \) is the height of the cylinder.
If you have specific questions or problems you need assistance with, feel free to share them, and I'll be happy to help!