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e-lub [12.9K]
3 years ago
5

If £23 = 500rubles, how many £ are in 616 rubles? Give your answer to 2 dp.

Mathematics
1 answer:
astraxan [27]3 years ago
5 0

Answer:

28.34

Step-by-step explanation:

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Find the area of the part of the paraboloid z = 9 - x^2 - y^2 that lies above the xy-plane.
svetoff [14.1K]

Parameterize this surface (call it S) by

\vec r(u,v)=u\cos v\,\vec\imath+u\sin v\,\vec\jmath+(9-u^2)\,\vec k

with 0\le u\le3 and 0\le v\le2\pi. Take the normal vector to S to be

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

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^{2\pi}\int_0^3u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv

=\displaystyle2\pi\int_0^3u\sqrt{1+4u^2}\,\mathrm du=\boxed{\frac{37\sqrt{37}-1}6\pi}

3 0
3 years ago
ABCD is a quadrilateral.
GrogVix [38]

Answer:

AC and BD are vertically oposite

and both sides are equal (equilateral) so AC = BD

As i think

4 0
3 years ago
I need help please. Can someone help me pleaseeeeeeeeeeeeeeeeeeeee
svetlana [45]

Answer:

to the 1st one its V=πr2h=π·92·6≈1526.81403

to the second one its V=πr2h=π·32·3≈84.823

ooooorrrrrrrV=πr2h=π·1.52·3≈21.20575

im saying or bc im not finna cap i haven't taken geometry in like 2 years and idk if the radius to second one is 3 or 1.5

Step-by-step explanation:

3 0
3 years ago
The graph illistrates a reflection of QPR. what line is QPR reflected across to create Q'P'R
andriy [413]
It’s reflected across the origin. Or to the right across the y axis. Then down across the x axis
7 0
3 years ago
How many laps does it takes to walk 1/4 mile
katrin2010 [14]
One lap. Usually, it would take 4 laps to walk a mile, but since its 1/4 it equals One lap.
7 0
3 years ago
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