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2 years ago

Help me on this one too

Mathematics

2 answers:

never [62]2 years ago

6 0

Answer:

C) -2.5<3

Hope this helps!

enot [183]2 years ago

6 0

Answer:

Step-by-step explanation:

-2.5 is actually greater than -3.

Negatives are pretty much positives just with the opposite/backwards formatting. So if both -2.5 and -3 were positive, or just -3 was positive, then the sentence would be correct.

Correct form:

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Suppose that surface σ is parameterized by r(u,v)=⟨ucos(3v),usin(3v),v⟩, 0≤u≤7 and 0≤v≤2π3 and f(x,y,z)=x2+y2+z2. Set up the sur

Bad White [126]

Looks like you have most of the details already, but you're missing one crucial piece.

$\sigma$ is parameterized by

$\vec r(u,v)=\langle u\cos3v,u\sin3v,v\rangle$

for $0\le u\le7$ and $0\le v\le\frac{2\pi}3$ , and a normal vector to this surface is

$\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}=\left\langle\sin3v,-\cos3v,3u\right\rangle$

with norm

$\left\|\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}\right\|=\sqrt{\sin^23v+(-\cos3v)^2+(3u)^2}=\sqrt{9u^2+1}$

So the integral of $f(x,y,z)=x^2+y^2+z^2$ is

$\displaystyle\iint_\sigma f(x,y,z)\,\mathrm dA=\boxed{\int_0^{2\pi/3}\int_0^7(u^2+v^2)\sqrt{9u^2+1}\,\mathrm du\,\mathrm dv}$

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2 years ago

There are a rack of 14 billiard balls. Balls numbered 1 through 8 are solid-colored. Balls numbered 9 through 14 contain stripes

Jet001 [13]

Answer:

3/7 / 42.8% chance

Step-by-step explanation:

There are 6 striped balls (9, 10, 11, 12, 13, 14) and 8 (1, 2, 3, 4, 5, 6, 7, 8) solid colored balls. So, 6 / 14 balls are striped.

(6 / 14 = 3 / 7)

this means that the probability of a ball being striped has the odds of 3/7

(3/7 = about 42.8% chance)

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1 year ago

Would the product change if 50 + 2 on the top of the area model was changed to 20 + 30 + 2? Explain

ollegr [7]

Answer:

It would not change

Step-by-step explanation:

Because if you add you get the same thing

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3 years ago

How many groups of 1/4 are in 3

Gnom [1K]

Answer:

Step-by-step explanation:

3*4/1 = 12/1 =12

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2 years ago

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As it may not be much, It's the best i can do, with such little wealth, take my earning, consider thy points as your spoils.

Leya [2.2K]

Answer:

Thank you!

Step-by-step explanation:

Have a nice day/night lol

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3 years ago

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