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artcher [175]
3 years ago
12

Can someone help me with these questions?

Mathematics
1 answer:
Elina [12.6K]3 years ago
4 0
1) 1, -2..for the first question
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An elephant sleeps 12% of a day what fraction of a day does an elephant sleep
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12/100 of a day, which reduces to 3/25 of a day.
8 0
3 years ago
Hi guys, can anyone help me with this triple integral? Many thanks:)
Crank

Another triple integral.  We're integrating over the interior of the sphere

x^2+y^2+z^2=2^2

Let's do the outer integral over z.   z stays within the sphere so it goes from -2 to 2.

For the middle integral we have

y^2=4-x^2-z^2

x is the inner integral so at this point we conservatively say its zero.  That means y goes from -\sqrt{4-z^2} and +\sqrt{4-z^2}

Similarly the inner integral x goes between \pm-\sqrt{4-y^2-z^2}

So we rewrite the integral

\displaystyle \int_{-2}^{2} \int_{-\sqrt{4-z^2}}^{\sqrt{4-z^2}} \int_{-\sqrt{4-y^2-z^2}}^{\sqrt{4-y^2-z^2}} (x^2+xy+y^2)dx \; dy \; dz

Let's work on the inner one,

\displaystyle\int_{-\sqrt{4-y^2-z^2}}^{\sqrt{4-y^2-z^2}} (x^2+xy+y^2)dz

There's no z in the integrand, so we treat it as a constant.

=(x^2+xy+y^2)z \bigg|_{z=-\sqrt{4-y^2-z^2}}^{z=\sqrt{4-y^2-z^2}}

So the middle integral is

\displaystyle\int_{-\sqrt{4-z^2}}^{\sqrt{4-z^2}}2(x^2+xy+y^2)\sqrt{4-y^2-z^2} \ dy  

I gotta go so I'll stop here, sorry.

7 0
3 years ago
Read 2 more answers
Please help! i need 5 answers expect for the 1st one! 20 points
Papessa [141]

Answer:

The answer for number 2 is 700,000

7 0
3 years ago
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What two numbers multiply to get 28 and 63
MakcuM [25]
2x14=28
7x9=63
Hope this helped?

4 0
3 years ago
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A newspaper reports says a company made £700.00 profit llast year. It was 12% more than last year work out how much profit the c
IgorLugansk [536]

Answer:

£616

Step-by-step explanation:

700 - 12% = 616

616 is 12% less than 700

8 0
3 years ago
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