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algol [13]
3 years ago
8

Someone help me with this!

Mathematics
2 answers:
JulijaS [17]3 years ago
8 0

Answer:

63

Step-by-step explanation:

you have to add

Alexxx [7]3 years ago
6 0

Answer: 63 inches or the second one.

Step-by-step explanation:

You can just split it into a pentagon and a triangle then add it with a calc or by hand either way its 63

Hope this helps. -V

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3 years ago
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natta225 [31]
Parameterize the part of the paraboloid within the cylinder - I'll call it S - by

\mathbf r(u,v)=\langle x(u,v),y(u,v),z(u,v)\rangle=\left\langle u\cos v,u\sin v,3u^2\right\rangle

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\displaystyle\iint_S\mathrm dS=\int_{u=0}^{u=2}\int_{v=0}^{v=2\pi}\|\mathbf r_u\times\mathbf r_v\|\,\mathrm du\,\mathrm dv
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=\displaystyle2\pi\int_{u=0}^{u=2}u\sqrt{1+36u^2}\,\mathrm du

Take w=1+36u^2 so that \mathrm dw=72u\,\mathrm du, and the integral becomes

=\displaystyle\frac{2\pi}{72}\int_{w=1}^{w=145}\sqrt w\,\mathrm dw
=\displaystyle\frac\pi{36}\frac23w^{3/2}\bigg|_{w=1}^{w=145}
=\dfrac\pi{54}(145^{3/2}-1)\approx101.522
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3 years ago
BRAINLIESTTT ASAP! PLEASE HELP ME :)
Kobotan [32]
B. 25, acute
You can see it’s acute. 160 would be obtuse
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