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Lana71 [14]
4 years ago
13

Plzz help and explain ur answer i might give brainliest

Mathematics
1 answer:
adoni [48]4 years ago
3 0

Answer:

  irrational

Step-by-step explanation:

π stands for the ratio of the circumference to the diameter of a circle, an irrational number near 3.14159. Multiplying any irrational number by a rational number (-11, for example) gives an irrational result.

  -11π is irrational

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John has a round swimming pool the distant from the center of the pool to the edge 3 m which formula can I used to find the area
DerKrebs [107]
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3 years ago
A train leaves at 11:32 and arrives at 13:24. It travelled at an average speed of 85 km/h.
Blababa [14]

Answer:

<h2>33.2Km</h2>

Step-by-step explanation:

<h3>Time used for journey = </h3>

13 : 24 - 11 : 32 = 1 : 92

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1 hour 92 minutes = 2 hours 32 minutes

<h3>changing 32 minutes to hours</h3>

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3 0
3 years ago
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7 0
4 years ago
a) find center of mass of a solid of constant density bounded below by the paraboloid z=x^2+y^2 and above by the plane z=4.(b) F
slava [35]

Answer: x-bar = y-bar = 0 whereas z-bar = 8/3

               M= (c^2)/8 which is intern equal to 2\sqrt{2}

Step-by-step explanation:

           Find the area, by setting the limits as

               = 4\cdot \int _0^{\frac{\pi }{2}}\int _0^2\int _{r^2}^4\:rdzdrd\theta

                =4\cdot \int _0^{\frac{\pi }{2}}\int _0^2r\cdot \:4-r^3drd\theta

                =4\cdot \int _0^{\frac{\pi }{2}}4d\theta

                 =8\pi

Therefore;

Mxy=  \int _0^{2\pi }\int _0^2\int _{r^2}^4\:zrdzdrd\theta

       z-bar = 8/3

M= 8\pi dividing it into two volume gives us = 4\pi

means  4\pi =\int _0^{2\pi }\int _0^{\sqrt{c}}\int _r^c\:rdzdrd\theta

             4\pi =\left(\pi c^2-2\pi \frac{c^{\frac{3}{2}}}{3}\right)

              c=2\sqrt{2}

       

                 

                 

5 0
4 years ago
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