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3 years ago

If a+ar =b+r the value of an item of b and r can be expressed as

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

5 0

$a+ar=b+r\\
a(1+r)=b+r\\
a=\dfrac{b+r}{1+r}$

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Vlad [161]

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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

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

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

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

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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 $\sqrt{2}$

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3 years ago

How much money will Claire have after 1 year?

Elena-2011 [213]

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Step-by-step explanation:

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2 years ago

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HELP PLZ 7k + 4s = 20 -8k + 2s = 10 What is the value of k?

Finger [1]

Divide 20 by 4=5
then 5 by 7=5/7

k=5/7

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