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Natalka [10]
3 years ago
10

Olivia wrapped a string around a circle and found it was 30 mm long. Approximately, what is the radius of this circle

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0

Answer:7.5

Step-by-step explanation: cause I looked it up lol

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A bookstore wants to determine how many books the people in the surrounding neighborhood read per month on average. they survey
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A system of two equal equations is shown below
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Parabola with vertex at (4, -2) and passes through<br> the point (2, 10)
amid [387]

Answer:

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6 0
4 years ago
The vertical cross-section of a solid is shown below has 10 in every side angle
Vlad1618 [11]
I think I know what it forms - a cone!!

I'm guessing that the angles at the end are 10 degrees so that would make angle CAB equal 5 degrees.
Line AB would be the radius of the "upper cone".
Line BC is 12/2 or 6
tangent (A) = BC / AB
tangent (5) = 6 / AB
AB = 6 / tan(5)
AB = 6 / 0.087489
AB = <span> <span> <span> 68.58 which is the radius of the "upper cone".</span></span></span>
Cone Volume = (PI * radius^2 * height) / 3
Cone Volume = (PI * 68.58 * 68.58 * 6) / 3
Cone Volume = <span> <span> <span> 29,551
That is just the "upper cone volume.  So, we multiply </span></span></span><span><span> <span> <span> 29,551 * 2
and get 59,102 which is the volume of the entire solid.
</span></span></span> </span>
Source for cone volume:
http://www.1728.org/volcone.htm


3 0
3 years ago
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