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Airida [17]
3 years ago
14

Surface area in terms of pi?

Mathematics
1 answer:
Lunna [17]3 years ago
5 0

\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}~~ \begin{cases} r=radius\\ \cline{1-1} V=972\pi \end{cases}\implies 972\pi =\cfrac{4\pi r^3}{3}\implies 2916\pi =4\pi r^3 \\\\\\ \cfrac{2916}{4\pi }=r^3\implies 729=r^3\implies \sqrt[3]{729}=r\implies 9=r \\\\[-0.35em] ~\dotfill\\\\ \textit{surface area of a sphere}\\\\ SA=4\pi r^2\qquad \qquad \implies SA=4\pi (9)^2\implies \boxed{SA=324\pi }

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Answer:

25% of 80 is D. 20kg

Step-by-step explanation:

50% of 80 is 40 and we know that 25% is half of 50%, so half of 40 would be 20.

So, the answer is D. 20kg

Hope this helps! :)

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2 years ago
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Step-by-step explanation:

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2 years ago
15 times as much as 1 fifth of 12
Ann [662]
1) Work out what 1/5 of 12 is
To do this, we divide 12 by 5
12/5 = 2.4

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2.4 x 15 = 36

<em>If you don't like decimals, you can also do it this way...
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This can be rewritten as 15  x  1/5  x  12
Multiplications alone can be performed in any order

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8 0
3 years ago
Read 2 more answers
How does the graph of the function f(x)=2x^3 - 1 differ from the graph of its parent function?
SOVA2 [1]

Answer:

here you go

Step-by-step explanation:

4 0
3 years ago
Need to pass this test to graduate
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The 1st graph has vertex in (-3, -3) which can be translated into
Horizontal shift left 3
Vertical shift down 3
Other than that, the graph shows y=x^2 so it wasn't compressed or stretched

The 2nd graph has vertex in (0, 0) which mean there is no vertical and horizontal shift. But the graph is facing down and it was slimmer than y=x^2 graph. When x=1, the result is y=3 which was 3 times more than it supposed to be.
The graph must be:
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The 3rd graph has vertex in (3, -3) which can be translated into
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Same as the 1st graph, the 3rd graph shows y=x^2 so it wasn't compressed or stretched.
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3 years ago
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