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densk [106]
3 years ago
9

Can someone please help me on number 19

Mathematics
1 answer:
Sloan [31]3 years ago
5 0

Answer:

12\pi x^{2} +21\pi x+9\pi

Step-by-step explanation:

V=Bh=\pi r^{2} h = \pi (4x+3)^{2} (3x+3) = \pi (12x^{2}+12x+9x+9 )=12\pi x^{2} +21\pi x+9\pi

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