15-04-2014
Mathematics

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help me plz with these questions. the picture is question 1 and the written on is question 2.
The base area of a prism is 150 square feet. Its height is 8 feet. What is the volume of the prism? A. 1200 ft3 B. 600 ft3 C. 400 ft3 D. 158 ft3

help me plz with these questions the picture is question 1 and the written on is question 2The base area of a prism is 150 square feet Its height is 8 feet What class=

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Аноним Аноним

15-04-2014

[tex]1.\\ V=\frac{1}{3}\pi r^2H\\\\r=12cm;\ H=8cm\\\\substitute\ to\ V:\\\\V=\frac{1}{3}\pi\cdot12^2\cdot8=\frac{1}{3}\pi\cdot144\cdot8=\pi\cdot48\cdot8=384\pi\ (cm^3)\\\\384\pi\ cm^3\approx384\cdot3.14\ cm^3=1205.76\ cm^3\approx1206\ cm^3\\\\Answer:A [/tex]

[tex]2.\\A_b=150\ ft^2\\\\H=8\ ft\\\\V=A_b\cdot H\\\\V=150\cdot8=1200\ (ft^3)\\\\\\Answer:A[/tex]

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