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mezya [45]
3 years ago
13

I need help with my algerbra

Mathematics
1 answer:
Molodets [167]3 years ago
5 0
I can help you what problem??
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Find the volume of the solid whose base is the region Ix I Iy I < 1 and whose vertical cross sections perpendicular to the y-
gavmur [86]

Answer:

volume of the solid = \frac{\pi }{3}

Step-by-step explanation:

As given , the region : |x| + |y| \leq 1

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when y ≤ 0 ,

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The given region is the rectangle with sides (0, 5) , (0, -5), (5, 0), (-5, 0)

As given , the vertical cross section are semicircle

As we know that the area of semi circle  = \frac{1}{2}\pi  x^{2}

Now,

Volume = \int\limits^0_-1    {\frac{\pi }{2} (1+y)^{2}  } \, dy + \int\limits^1_0    {\frac{\pi }{2} (1-y)^{2}  } \, dy

            = \frac{\pi }{2} (\frac{(1+y)^{3} }{3} ) - \frac{\pi }{2} (\frac{(1-y)^{3} }{3} )

           = \frac{\pi }{6}[1-0] - \frac{\pi }{6}[0-1]

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⇒volume of the solid = \frac{\pi }{3}

4 0
3 years ago
Thank you so much. (20 characters required)
padilas [110]
#3.
 √18²-5.7²    Second Choice

#4
l²=5²+4² = 25+16 = = 41
l=√41
l= 6.4

Second Choice

#5 Only A --- First choice

#7 6 ----- Third choice

#8 V= \pi r^2(h)=  \pi 10^2(3) = 314(3)=942  units³ ---Second choice


6 0
2 years ago
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