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Shkiper50 [21]
3 years ago
8

Finding Circumference

Mathematics
1 answer:
SpyIntel [72]3 years ago
3 0

Answer:

Step-by-step explanation:

Determine the radius of a circle. ...

Substitute this value to the formula for circumference: C = 2 * π * R = 2 * π * 14 = 87.9646 cm .

You can also use it to find the area of a circle: A = π * R² = π * 14² = 615.752 cm² .

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Simplify the surd 3√ 20 +√ 45 ​
melisa1 [442]

Answer:

9\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplify the radicals

\sqrt{20}

= \sqrt{4(5)}

= \sqrt{4} × \sqrt{5}

= 2\sqrt{5}

\sqrt{45}

= \sqrt{9(5)}

= \sqrt{9} × \sqrt{5}

= 3\sqrt{5}

Then

3\sqrt{20} + \sqrt{45}

= 3(2\sqrt{5} ) + 3\sqrt{5}

= 6\sqrt{5} + 3\sqrt{5}

= 9\sqrt{5}

3 0
3 years ago
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Let u = <-9,4>, v = <8, -5>. Find u - v.
OLEGan [10]
I am guessing vectors :)

(-17, 9)

or in polar form

√370, -27°53'50"
7 0
3 years ago
3+2k= -4(k+4)<br> i need help
Rom4ik [11]

Answer:

k = -19/6

This picture should help you out.

First you distribute -4 among everything in the parenthesis. You will get -4k - 16.

Next you subtract 3 from -16, to get -19.

After that you add 4k to 2k, to get rid of -4k, and you get 6k.

So 6k = -19, and finally you divide 6 on both sides of the equal sign to get k = -19/6.

Hope this helped :)

3 0
3 years ago
Jamal draws a 180-degree straight line on his paper.He draws a line down the middle of the line perpendicular to the first line.
PolarNik [594]

Answer:

I think it will be 90 degree

4 0
4 years ago
What is 2 x 10 to the -6th power?
White raven [17]

Answer:

2 x 10 to the -6th power is .000002.

3 0
3 years ago
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