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rusak2 [61]
3 years ago
9

PLEASE HELP! I will mark you as brainliest!

Mathematics
1 answer:
patriot [66]3 years ago
3 0

Answer:

25%

Step-by-step explanation:

Ab = 2Aa

Percentage of A is 50%

But A is half of B, we multiply by 1/2.

50 x 1/2 = 25

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What has the same value as 30%, percent of 18?
Ne4ueva [31]

Answer:

Answer: 60.

Step-by-step explanation:

30 percent (calculated percentage %) of what number equals 18?

7 0
3 years ago
There are 65 children in the sixth grade. If the boys and girls are in the ratio of 8:5, what equation should be used to find th
AveGali [126]

Answer:

8x+ 5y= 65

8x+ 5x= 65

Step-by-step explanation:

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6 0
3 years ago
A wagon wheel has a radius of 4.9 inches. Which of the following is closest to the distance the wagon travels in two turns of th
Otrada [13]

Answer:

Just under 62 inches.

Step by Step:

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8 0
3 years ago
Read 2 more answers
4 MINSSSS ANSWER ASAP <br><br> Evaluate -3x^3 - 4x for x = -1.<br><br> A) 1<br> B) 7<br> C) -1
-Dominant- [34]
-3x^3 - 4x

x = -1

-3(-1)^3 - 4(-1)

(-1)^3 = (-1) x (-1) x (-1) = -1

-3 x -1 = 3

-4 x -1 = 4

3 - 4 = -1


-1 is your answer

hope this helps
6 0
3 years ago
Sketch the solid described by x 2 + y 2 ≤ z ≤ 1. Use the Divergence Theorem to evaluate the surface integral over the boundary o
kirill115 [55]

Looks like

\vec F(x,y,z)=y\,\vec\imath+z\,\vec\jmath+xz\,\vec k

The solid described by x^2+y^2\le z\le 1 is the interior of the region bounded by the paraboloid z=x^2+y^2 and the plane z=1. Call this region R.

By the divergence theorem,

\displaystyle\iint_{\partial R}\vec F\cdot\mathrm d\vec S=\iiint_R\mathrm{div}\vec F\,\mathrm dV

The divergence is

\mathrm{div}\vec F(x,y,z)=(y)_x+(z)_y+(xz)_z=x

so that the surface integral reduces to

\displaystyle\iiint_Rx\,\mathrm dV

or in cylindrical coordinates,

\displaystyle\int_0^{2\pi}\int_0^1\int_{r^2}^1r^2\cos\theta\,\mathrm dz\,\mathrm dr\,\mathrm d\theta=\boxed{0}

4 0
3 years ago
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