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3 years ago

Help. I’ll give more points and brainiest

Mathematics

2 answers:

ad-work [718]3 years ago

6 0

It should be A. 18CM

AveGali [126]3 years ago

4 0

Answer:

Step-by-step explanation:

13.5 / 3 = 4.5

so 4 x 4.5 = 16 + 2 = 18

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The rectangular box can be constructed from the pattern above. The box has a length of 8 units, a width of 2 units, and a height

adoni [48]

Answer:

72 units

Step-by-step explanation:

SA=2lw+2lh+2hw

SA=2(8x2) + 2(8x2) + 2(2x2) Note, Not distributive

SA= 2(16) + 2(16) + 2(4)

SA= 32 + 32 + 8

SA= 72

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3 years ago

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What is a polynomial function in standard form with zeros 1,2,3 and -3

AlladinOne [14]

Answer:

Step-by-step explanation:

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3 years ago

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Alex worked 45.75 hours this week at $7.86 per hour. what is his gross pay? $382.19 $359.60 $314.40 $391.82

Eva8 [605]

Assuming that no overtime was factored into his wages, Alex would have gotten a gross pay of $359.60. This was done by multiplying $7.86 x 45.75 hours.

Assuming that overtime was factored into his wages, Alex would have gotten a gross pay of $382.19. This was done by figuring out how much "time and a half" is for over time. "time" = 7.86; "and a half"= 7.86/2= 3.93

Time AND a half would equal 7.86 + 3.93= 11.79.

So, Alex would get an additional $11.79 for the hours OVER 40 hours which was 5 hours and 75 minutes..

11.79 x 5.75 = 67.79

Total hours for a 40 hour work week for Alex with 7.86 would equal a gross pay of 314.40. Plus 67.79. = 382.19

6 0

3 years ago

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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 S 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 S 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

3. What is the area of triangle ABC? 2in. 2in. B The area of triangle ABC is

lozanna [386]

I got 12 for my answer

8 0

3 years ago