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2 years ago

What is the circumference of this circle

Mathematics

2 answers:

BigorU [14]2 years ago

7 0

Answer:

The circumference of the circle is

$12.56$

Step-by-step explanation:

The formula to calculate the circumference of a circle is

$2\pi \: r$

By looking at the image we can see that the radios is 2 km, and we are going to use pi as 3.14. So..

$formula \: = \: 2\pi \: r \\ 2(3.14)(2) = 6.28 \times 2 \\ = 12.56km$

Anna11 [10]2 years ago

6 0

Answer:

12.56

Step-by-step explanation:

:))))

C= 2 x π x radius

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3 years ago

Which is the graph x>2?

LenaWriter [7]

Answer:

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3 years ago

Six Less than the product of 4 and a number is equal to 5. Write an equation

Anna71 [15]

Let "x" be the mystery number
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3 0

4 years ago

Read 2 more answers

The sum of 30 times (1/3)^(n-1) from 1 to infinity

sergeinik [125]

Let

$S_n=\displaystyle1+\frac13+\frac1{3^2}+\cdots+\frac1{3^n}$

Then

$\dfrac13S_n=\displaystyle\frac13+\frac1{3^2}+\frac1{3^3}+\cdots+\frac1{3^{n+1}}$

and

$S_n-\dfrac13S_n=\dfrac23S_n=1-\dfrac1{3^{n+1}}\implies S_n=\dfrac32-\dfrac1{2\cdot3^n}$

and as $n\to\infty$ , we end up with

$\displaystyle\lim_{n\to\infty}S_n=\lim_{n\to\infty}\sum_{i=1}^{n+1}\frac1{3^{i-1}}=\lim_{n\to\infty}\left(\frac32-\frac1{2\cdot3^n}\right)=\frac32$

So we have

$\displaystyle\sum_{n=1}^\infty30\left(\frac13\right)^{n-1}=30\cdot\frac32=45$

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3 years ago

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weeeeeb [17]

Answer:

that would be 4/13

Step-by-step explanation:

i think

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3 years ago

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