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3 years ago

9

Show ur work idc if ur answer is wrong but i need to copy work

1 answer:

Yuliya22 [10]3 years ago

8 0

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If you could help me with this it would be greatly appreciated!

Ierofanga [76]

Here is your answer

B. $\sqrt{81}$

C. 9

REASON:

Let the side of square be a feet

Area of square = ${a}^{2}$

so,

${a}^{2}= 81$

$a= \sqrt{81}$

$a= 9 feet$

HOPE IT IS USEFUL

3 0

3 years ago

Read 2 more answers

4 Aldon, the elf, made 245.6 pounds of candy in 5 hours. How much did he make each hour?

Virty [35]

The answer to your question is 49.12

4 0

3 years ago

NO LINKS PLEASE- OR I SWEAR-

lesantik [10]

Answer:

60

Step-by-step explanation:

To find the mean;

add up the data

(50+60+60+70) =240

Then divide by the number of data points

240/4 = 60

The mean is 60

5 0

3 years ago

Use a surface integral to ﬁnd the surface area of the portion of the sphere xUse a surface integral to ﬁnd the surface area of t

brilliants [131]

Parameterize this surface (call it $S$ ) by

$\vec r(u,v)=\cos u\sin v\,\vec\imath+\sin u\sin v\,\vec\jmath+\cos v\,\vec k$

with $0\le u\le2\pi$ and $0\le v\le\dfrac\pi4$ . The limits on $u$ should be obvious. We find the upper limit for $v$ by solving for $v$ where the sphere and cone intersect:

$\begin{cases}x^2+y^2+z^2=1\\z=\sqrt{x^2+y^2}\end{cases}\implies x^2+y^2=\dfrac12$

$\implies(\cos u\sin v)^2+(\sin u\sin v)^2=\dfrac12$

$\implies\sin^2v=\dfrac12$

$\implies\sin v=\dfrac1{\sqrt2}\implies v=\dfrac\pi4$

Take the normal vector to $S$ to be

$\vec r_u\times\vec r_v=-\cos u\sin^2v\,\vec\imath-\sin u\sin^2v\,\vec\jmath-\cos v\sin v\,\vec k$

(orientation does not matter here)

Then the area of $S$ is

$\displaystyle\iint_S\mathrm dA=\iint_S\|\vec r_u\times\vec r_v\|\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^{\pi/4}\int_0^{2\pi}\sin v\,\mathrm du\,\mathrm dv$

$=\displaystyle2\pi\int_0^{\pi/4}\sin v\,\mathrm dv=\boxed{(2-\sqrt2)\pi}$

4 0

3 years ago

A giant chocolate bar is 19 inches in length, 10 inches in width, and 1 inch in height. Answer the following

Klio2033 [76]

Answer:

9.5x5x0.5

23.75

109.5

Step-by-step explanation:

Ⓗⓘ ⓣⓗⓔⓡⓔ

:

9.5x5x0.5

:

Volume would be 9.5*5*0.5=23.75

:

2wl+2lh+2hw

2(5*9.5)+2(9.5*0.5)+2(0.5*5)=95+9.5+5=109.5

(っ◔◡◔)っ ♥ Hope this helped! Have a great day! :) ♥

Please, please, please give brainliest, it would be greatly appreciated, I only need one more before I advance, and this took forever to write!

7 0

3 years ago

Read 2 more answers