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3 years ago

PLS HELP!!! ILL GIVE BRAINLIEST IF YOU EXPLAIN YOUR ANSWER

Mathematics

2 answers:

Xelga [282]3 years ago

4 0

Answer:

c. Positive, as time goes on, more women are in army

Step-by-step explanation:

The graph shows the rise of the percentage of women in army in the course of time. In 1981 it was 9%. In 1991, it increased by 2% .In 2001, it rose sharply to 15%. But in 2011, it faced slight decrease in the percentage. But overall, the graph highlights the gradual increase of the percentage , which is positive.

Llana [10]3 years ago

4 0

Answer:

Positive, the two variables follow the same trend

Step-by-step explanation:

Positive correlation is when two variables trending in the same direction. Even though the last point is not positively correlated individually, statistically, and also by regression, the system as a whole has a positive trend.

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Usimov [2.4K]

-.0336

-.14*.12 = -.0168
.14*.12 = .0168
-.0168-.0168=-.0336

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Answer:

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Step-by-step explanation:

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bearhunter [10]

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4 years ago

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Vsevolod [243]

Answer:

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3 years ago

Find the flux of F = x^3 i + y^3 j + z^3k through the closed surface bounding the solid region x^2 + y^2 ≤ 4, 0 ≤ z ≤ 4

givi [52]

Use the divergence theorem. Let $R$ be the cylindrical region, then

$\displaystyle\iint_{\partial R}\mathbf F\cdot\mathbf n\,\mathrm dS=\iiint_R\nabla\cdot\mathbf F\,\mathrm dV$

(where $\mathbf n$ denotes the unit normal vector to $\partial R$ , but we don't need to worry about it now)

We have

$\mathrm{div }\mathbf F=(\nabla\cdot\mathbf F)(x,y,z)=\dfrac{\partial\mathbf F}{\partial x}+\dfrac{\partial\mathbf F}{\partial y}+\dfrac{\partial\mathbf F}{\partial z}$
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For the solid $R$ with boundary $\partial R$ , we can set up the following volume integral in cylindrical coordinates for ease:

$\displaystyle3\iiint_R(x^2+y^2+z^2)\,\mathrm dV=3\int_{z=0}^{z=4}\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=2}(r^2+z^2)r\,\mathrm dr\,\mathrm d\theta\,\mathrm dz$
$=\displaystyle6\pi\int_{z=0}^{z=4}\int_{r=0}^{r=2}(r^3+rz^2)\,\mathrm dr\,\mathrm dz$
$=\displaystyle12\pi\int_{z=0}^{z=4}(2+z^2)\,\mathrm dz$
$=352\pi$

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3 years ago