what is the circumference of a circle with an area of 20 pi

Answers

Answer 1

Answer:

28.1 units

Step-by-step explanation:

Area of circle= πr², where r is the radius.

Given that the area is 20π,

20π= πr²

Divide both sides by π:

20= r²

Square root both sides:

[tex]r = \sqrt{20} [/tex]

[tex]r = \sqrt{4(5)} [/tex]

[tex]r = ( \sqrt{4} )( \sqrt{5} )[/tex]

[tex]r = 2 \sqrt{5} [/tex]

Circumference of circle= 2πr

Substitute the value of r:

Circumference of the circle

[tex] = 2(\pi)( 2\sqrt{5} )[/tex]

[tex] = 4\pi \sqrt{5} [/tex]

= 28.1 units (3 s.f.)


Related Questions

Jerry took his extended family out for a dinner that cost $480. Jerry paid 5% sales tax and left a 20% tip on $480. What was the total cost?

Answers

So you add 480 plus 24 in sales tax then you add 96 for the tip and if you add them all together you should get 600$

The amount of the sales tax and tip is $96 and $24, then the total cost of the dinner will be $600.

What is the percentage?

The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.

Jerry took his extended family out for a dinner that cost $480. Jerry paid 5% sales tax and left a 20% tip on $480.

Then the cost of the sales tax will be

→ 0.05 × 480 = $24

Then the amount of the tip will be

→ 0.20 × 480 = $96

Then the total cost of the dinner will be

→ $24 + $96 + $480 = $600

More about the percentage link is given below.

https://brainly.com/question/8011401

Complete the equation so that it has
infinitely many solutions.
48 - 2) = (2x -

Answers

The equation can be simplified to x/2-8, which mean that after timing with 1/4, the remaining should be 32 because 32*1/4 would be 8.
Final answer: Missing part of the answer is 32. Please mark me brainliest. Thanks

Can some one please help

Simplify 4(11-6)+2

Answers

Answer: 22

Step-by-step explanation:

11 - 6 = 5

4 x 5 = 20

20 + 2 = 22

' pls can i have brainliest? i need it for my goal'

Answer:

22

Step-by-step explanation:

Solve whats in the paranthesis: (11-6) = 5

New problem: 4(5) + 2

Then multiply: 20+2

Finally add both numbers together: 22

If the spinner shown is spun 40 times,predict the number of times the spinner would land on section A. Give the number of times only

Answers

Picture is not stated. But given the text, I would say divide the # of section A / 40 = some number

Volume Of This Cylinder

Answers

Answer:

6

Step-by-step explanation:

1. The Formula for volume of a Square is V=πr2h

2. So u would plug everything in.. so v- π4²12

3. so then u get 6

x²+10+7=0 by completing the square

Answers

Answer:

x=−5+3–√2

x=−5−3–√2

Step-by-step explanation:

Ms. Howard buys a car for $500 and adds a music system that costs $200. Then she adds a set of seat covers for the price shown.

A photo of two seat covers is shown. A price tag reads, Sale, fifty dollars.

Answers

Answer:

$750 that is the answer if you add them all up

This morning, Sarah's team started at zero and earned 5 points for perfect attendance. The team lost 10 points for disruptive behavior at lunch. Write an addition equation to describe how many points Sarah's team earned. Give the
sum.

Answers

0+5=5
5-10= -5
They started at 0. The team earned 5 points and lost 10. they ended up with -5 points.

If £29 = 500 rubles, how many £ are in 1,260 rubles? Give your answer to 2 dp

Answers

Answer:

6.21 Pound sterling

Step-by-step explanation:

You have to divide first to find one pound of rubles, then you multiply to get your answer

HELP ME ASAP!!!!!!!!!!!!!!!!!

Answers

Answer:

good luck i need to conquer europe

5.3g + 8 = 3.3g + 20

Answers

Answer:

g = 6

Step-by-step explanation:

Step 1: Subtract 3.3g from both sides.

Step 2: Subtract 8 from both sides.

Step 3: Divide both sides by 2.

(hope this helps) :)

translate seven minus three times a number into an algebraic expression

Answers

7 - 3 x X
Key: x is times and X is “a number”

Correct=Brainlest Evaluate (-4-0.7-1)÷-4 Convert into a decimal​

Answers

Answer:(-4 - 0.7 - 1)÷-4 = 57/40 = 1 17/40 = 1.425

Spelled result in words is fifty-seven fortieths (or one and seventeen fortieths).

How do you solve fractions step by step?

   Conversion a decimal number to a fraction: 0.7 = 7/10 = 7/10

   a) Write down the decimal 0.7 divided by 1: 0.7 = 0.7/1

   b) Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.)

   0.7/1 = 7/10

   Note: 7/10 is called a decimal fraction.

   c) Simplify and reduce the fraction

   7/10 = 7 * 1/10 * 1 = 7 * 1/10 * 1

   Subtract: -4 - 0.7 = -4/1 - 7/10 = -4 · 10/1 · 10 - 7/10 = -40/10 - 7/10 = -40 - 7/10 = -47/10

   For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators - LCM(1, 10) = 10. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 1 × 10 = 10. In the following intermediate step, the fraction result cannot be further simplified by canceling.

   In other words - minus four minus seven tenths = minus forty-seven tenths.

   Subtract: the result of step No. 2 - 1 = -47/10 - 1 = -47/10 - 1/1 = -47/10 - 1 · 10/1 · 10 = -47/10 - 10/10 = -47 - 10/10 = -57/10

   For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators - LCM(10, 1) = 10. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 10 × 1 = 10. In the following intermediate step, the fraction result cannot be further simplified by canceling.

   In other words - minus forty-seven tenths minus one = minus fifty-seven tenths.

   Divide: the result of step No. 3 : (-4) = -57/10 : (-4) = -57/10 · -1/4 = -57 · (-1)/10 · 4 = 57/40

   Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of -4/1 is 1/-4) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, the fraction result cannot be further simplified by canceling.

   In other words - minus fifty-seven tenths divided by minus four = fifty-seven fortieths.

what is the answer ?

Answers

Answer:

arc VW = 66°

Step-by-step explanation:

The inscribed angle WXY is half the measure of its intercepted arc WY, so

WY = 2 × 57° = 114°

Arc YX = 180° ( semi- circle ) , then

VW = YX - WY = 180° - 114° = 66°

Answer:

66°

Step-by-step explanation:

1) m(WY)=2*57=114°;

2) m(WX)=180-m(WY)=180-114=66°

Solve for x step by step

Answers

Answer:

n=11

Step-by-step explanation:

n+5/-16=-1, multiply both sides by -16

n+5=16, subtract 5 from both sides

n=11

point S lies an AB. If AB=34 units, AS=5+2x units, and SB=x+2 units, what is the length of AS in units?

Answers

Answer:

5+2x+x+2=34

7+3x=34

7-7+3x=34-7

3x=27

3x/3=27/3

x=9

5+2x=AS

5+(2*9)=AS

5+18=AS

23=AS

23 units

Step-by-step explanation:

need help on proportions question urgently!!!!!!

Answers

Answer:

SSS~

RQP

Step-by-step explanation:

36/15 = 2.4

48/20 = 2.4

72/30 = 2.4

Triangles are similar by SSS~.

triangle JKL is similar to triangle RQP

❗ℂℝℝℂ ℕℝ+ℙℕℕ ℍ ℝ ℝℕ + ℙℕ❗
~Simplify fully:
[tex] \sqrt{12} [/tex]
[tex] \sqrt{27} [/tex]
[tex] \sqrt{50} [/tex]
thanks xx)​

Answers

Answer:

Exact Form:  2 √ 3 , 3 √ 3 , 5 √ 2

[tex] \sqrt{12} \\ = \sqrt{4 \times 3} \\ = \sqrt{2 \times 2 \times 3} \\ = \boxed{ 2 \sqrt{3} }[/tex]

﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋

[tex] \sqrt{27} \\ = \sqrt{9 \times 3} \\ = \sqrt{3 \times 3 \times 3} \\ \boxed{3 \sqrt{3} }[/tex]

﹋﹋﹋﹋﹋﹋﹋﹋﹋﹋

[tex] \sqrt{50} \\ = \sqrt{5 \times 10} \\ = \sqrt{5 \times 5 \times 2} \\ = \boxed{5 \sqrt{2} }[/tex]

꧁✿ ᴿᴬᴵᴺᴮᴼᵂˢᴬᴸᵀ2222 ✬꧂

Which equations have the same pair of solutions? Select all that apply.

n(n + 3)(n - 4) = 0
2n(4n + 6)(6n - 4) = 0
0 = 2n(6 - 4n)(4 - 6n)
0 = n(2n + 3)(3n - 2)
2n(2n + 3)(3n - 2) = 0
3n(6n + 9)(9n - 6) = 0

Answers

2, 4, 5 and 6. That is the order of equations

Help plsssss! I need this done

Answers

the answer is B hope this helps!

Answer:

B)p=20

Step-by-step explanation:

25=5p/4

25×4=5p

100=5p

p=100/5

p=20

i need some frikin help on equations like this 4x>2 i used to do questions like this 4x=2 (basically one step equations) im just really confused

Answers

Answer:

x>1/2

Step-by-step explanation:

4x>2

4x/4

2/4

x>2/4

2/4 divided by 2= 1/2

x>1/2

Which equations describes a line that has a y-intercept of 4 and a slope of 3?

Answers

Hello there!

If a line has a slope of 3 and a y-intercept of 4, its equation looks like this:

[tex]y=3x+4[/tex]

Hope this helps you! Mark Brainliest, please! :)

~Just a joyful teen

[tex]SilentNature[/tex]

Answer:

y = 3x + 4

Step-by-step explanation:

Which statement about the slope of a line is true?

Answers

Answer:

wheres the line

Step-by-step explanation:

Simplify −n+(−4)−(−4n)+6

Answers

Answer:

2+3n

Step-by-step explanation:

-n+(-4)-(-4n)+6-n-4+4n+6-4+6-n+4n2+3n

Can someone help me with number 8 :(

Answers

Answer:

a1=5

d=9-5=4

a20=5+19×4=81

what’s the value of 5%

Answers

Answer:

0.05 in decimal form

Step-by-step explanation:

I don't know if you accidentally left something out but if you did I can edit my answer or put the answer in the comments.

can someone please help me as soon as possible​

Answers

Answer:

a quadratic function is letter A

One day, while going to her office, Suchitra has to go to her son's school to attend PTM. Then she worked
in the office and left early as some guests are arriving at her house in the evening. She went to the bank after
the office and then to the shop to purchase some groceries to welcome the guests. The route of Suchitra has
been shown in the Cartesian plane in the figure below. The location of Suchitra's house in Cartesian plane is
10.-4).
of the chane

Answers

10000/3355532 that might be it

Solve for x: 16 = x + 32

Answers

Answer:

-16

Step-by-step explanation:

Use everyone's favourite thing: ALGEBRA!!!

16=x+32

16-32=x

-16=x

Hope that helps

Step-by-step explanation:

16=x+32

16-x=32

-x=32-16

-x=16

X=-16

hii i need help! write the inequality represented by the graph below.

Answers

95252226!!
0363373
44448
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