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vichka [17]
3 years ago
14

What type of number is 2i-7?

Mathematics
2 answers:
PilotLPTM [1.2K]3 years ago
7 0

Answer:

It is a complex number.

Composed by imaginarium number and real =)

Best regards

krek1111 [17]3 years ago
7 0

Hey there! :)

The number 2i-7 is an <em>imaginary number. </em>

<em />

i represents an imaginary value, so therefore, it is imaginary and is considered a speculative number.

Often it represents a value that mathematical rules wouldn't allow, it wouldn't be able to be calculated.

I hope this helps!

~kaikers

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A sphere and a cylinder have the same radius and height. The volume of the cylinder is 27 pi feet cubed.
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Answer:

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Step-by-step explanation:

Given

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Required

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From the question,

<u>We have that</u>

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2. The height of the sphere is the same as the height of the cylinder.

From (2) above;

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V = πr²h

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27 = πr²h

Divide both sides by h

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Expand the above expression

V = \frac{4}{3}\pi r^2 * r

Substitute \pi r^2 = \frac{27}{h}

V = \frac{4}{3} * \frac{27}{h} * r

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So,

V = \frac{4}{3} * \frac{27}{h} * \frac{h}{2}

V = \frac{4}{3} * \frac{27}{2}

V = \frac{2}{3} * 27

V = \frac{2}{3} (27)

V = two-third (27)

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