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Vera_Pavlovna [14]

3 years ago

15

Which of the following is a statistical question? Select all that apply A. How many cats do you own? B. How old is your cat? C.

How old is a cat in a shelter? D. What percentage of people like cats? What the name of your cat?

1 answer:

Mashutka [201]3 years ago

7 0

Answer:

D

Step-by-step explanation:

For all the other questions, there is more than one question.

Please mark as Brainliest! :)

Have a nice day.

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1.6x 10^5 in standard notation.

Gekata [30.6K]

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ANSWER: 160,000

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4 years ago

Find the flux of the vector field F = 〈e-z,4z,6xy) across the curved sides of the surface S = {(x,y,z): z= cos y, lys π, 0sxs4}

Len [333]

I'll go ahead and assume you meant to say that <em>S</em> is the surface given by

$S = \left\{(x,y,z) \mid z = \cos(y)\text{ with } 0\le y\le \pi\text{ and }0\le x\le4\right\}$

This immediately gives us a parameterization for the surface,

$\vec r(x, y) = \left\langle x, y, \cos(y)\right \rangle$

The upward-pointing normal vector to this surface is then

$\vec n = \dfrac{\partial\vec r}{\partial x} \times \dfrac{\partial\vec r}{\partial y} = \left\langle0,\sin(y),1\right\rangle$

Then the flux of $\vec F(x,y,z) = \left\langle e^{-z}, 4z, 6xy\right\rangle$ across <em>S</em> is

$\displaystyle \iint_S \vec F(x,y,z)\cdot\mathrm d\vec s = \int_0^4\int_0^\pi \vec F(x,y,\cos(y))\cdot\vec n\,\mathrm dy\,\mathrm dx \\\\ = \int_0^4\int_0^\pi \left\langle e^{-\cos(y)},4\cos(y),6xy\right\rangle \cdot \left\langle0,\sin(y),1\right\rangle \,\mathrm dy\,\mathrm dx \\\\ = \int_0^4\int_0^\pi (4\sin(y)\cos(y)+6xy)\,\mathrm dy\,\mathrm dx \\\\ = 2 \int_0^4\int_0^\pi (\sin(2y) + 3xy)\,\mathrm dy\,\mathrm dx = \boxed{24\pi^2}$

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3 years ago

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Alexeev081 [22]

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Step-by-step explanation:

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3 years ago

Help me with this math pls

elena55 [62]

For the first triangle x=70. 180-40 is 140. Divided that by 2 and you’d get 70.

The second triangle x=90. 180-45 is 135. 135-45 (the angle congruent to the other 45 degree angle) is 90.

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