Mathematics Middle School

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Find the radius of a circle where the area of the circle equals the circumference of the circle.

Answers

Answer 1
Answer:  Radius = 2

======================================================

Explanation:

For a circle with radius r, we have these formulas

area = pi*r^2 circumference = 2*pi*r

Equate the two expressions and isolate r

pi*r^2 = 2*pi*r

pi*r^2 - 2*pi*r = 0

pi*r(r - 2) = 0

pi*r = 0 or r - 2 = 0

r = 0 or r = 2

A radius of 0 doesn't make much sense, so we ignore it. The only possible answer is r = 2.

-------

If the radius is 2, then,

area = pi*r^2 = pi*2^2 = pi*4 = 4picircumference = 2*pi*r = 2*pi*2 = 2*2*pi = 4pi

Both result in 4pi to help confirm our answer.

Answer 2
Set up and equation
Circumference = area
2pi•r = pi•r^2
Solve for r
2pi/pi = r^2/r
2=r

Related Questions

Explain how you can find the centre of a circle if you are given three points on the circumference. Use a drawing to support your answer.

Can someone help me with this I don't understand it. It's from Chapter Test from the Nelson Textbook for Grade 8's in chapter 10. A diagram would be helpful too. Thanks.

Answers

Join up the points to form two lines
Construct the perpendicular bisector of one line
Construct the perpendicular bisector of the other line
Where they cross is the center of the circle
Place compass on the center point, adjust its length to reach any point, and draw your circle
Needed these points sorwy

Someone please help me!

Answers

Answer: the police station is 7 blocks south of the school.

The post office is 6 blocks east of the police station.

It’s further to go from home to grocery.

Step-by-step explanation: counted the blocks, use the compass.

A store pays $1.50 per pound for cat litter. One cubic foot of cat litter weighs about 48 pounds. What is the selling price of cat litter in the container shown when the markup is 10%?

Answers

Answer:

$19.250352

Step-by-step explanation:

Selling price of cat litter in the container shown when the markup is 10% is $33264.

What is the volume of rectangular prism?

The volume of a rectangular prism is defined as the total space occupied by the rectangular prism. The volume of a rectangular prism formula is obtained by multiplying the length, breadth and height of the prism.

One pound price after markup = 1.50 (1 + 10%) = $1.65

The volume of the container = length  × width × height

= 10 × 6 × 7

= 420 [tex]in^{3}[/tex]

The final selling price

= 1.65 × 420 × 48

= $33264

Hence, selling price of cat litter in the container shown when the markup is 10% is $33264.

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put in order from greatest to least
2.96 , 3 1/5, 3.48, 3 1/4

​

Answers

2.96, 3 1/5, 3 1/4, 3.48

please help me due at tomorrow 8a.m

Answers

Answer:

C

Step-by-step explanation:

Probability increases exponentially as you increase the amount of times you repeat an experiment, so the only answer would be C.

I think it is C in my opinion :)

According to the line plot, what is the total distance run for all of the runners combined

Answers

Answer:

3.53

Step-by-step explanation:

You can convert it to a fraction by using an online decimal converter.

Answer: 3.5

Fraction: 7/2

Step-by-step explanation:

help it is due today and not links or files of downloads of anything like that just type in your answer plz and thank u :)

Answers

Answer:

p=216

Step-by-step explanation:

12 nights

18 pages per night

12 x 18=216

The answer is P=216

7th grade math can someone help me

Answers

Answer:

170º and 10º

Step-by-step explanation:

You can setup the equation as 17x + x and then set that equal to 180

so the full equation would look like 17x + x = 180

Then you can simplify it to 18x = 180 and then you just divide 180 by 18 which equals 10

That means that x = 10

So the two measures would be 170 and 10

Teresa and Ishmael worked the same number of days and earned equal amou
a rate of $60 per day. Ishmael earned a rate of $40 per day and received a bony

did each of them work?

O 3 days

O 1.4 days

O 7 days

O 5 days

Answers

7 days, correct if I’m wrong

Can someone please help me! No bots will be acceptable!!! This is due today. Pls help!! I just need help with number 2. , the first question. Thanks!

Answers

i dont see anything, what do you need help with?

I don’t see any pictures?

е The solid shown below is made by combining two rectangular prisms. What is the volume of the solid?

A. 60 cubic inches
В. 120 cubic inches
C. 216 cubic inches
D. 48 cubic inches​

Answers

A 60 cubic inches because you have to split the prism in two and multiply the number by each other
The answer is
A. Sooo yeah 60cubic inches

Which of these represents slope-intercept form?​

Answers

Y=mx + b is slope intercept form
Y=mx+b hope this helps!

A box that measures 4 centimeters by 5 centimeters by 2 centimeters.
What is the volume of the rectangular solid?

11 cubic centimeters
22 cubic centimeters
30 cubic centimeters
40 cubic centimeters

Answers

40 cubic centimeters

Explanation:
The formula for the volume of a rectangular solid is width x length x height.
In this case, it would be:
4 x 5 x 2 = 40

The answer would be 40 cubic centimeters

Have a nice day!

plz help !

Question 11 of 14
Drag the operation signs to make the equation true. An operation may be used once. more than once, or not at all

Answers

it’s 12 DIVIDE (7-4)+5 TIMES 3=19
12 divide (7-4) plus 5 x 3= 19

Which statement best describes the relationship between the number of hours spent working and the number of hours spent playing video games?

Fewer hours worked, fewer hours spent playing video games.
Greater hours worked, greater hours spent playing video games.
Greater hours worked, fewer hours spent playing video games.
There is no relationship between hours spent working and hours spent playing video games.

Answers

Answer:

I believe the answer is C) Greater hours worked, fewer hours spent playing video games.

Step-by-step explanation:

On the graph, you can see the trend of when you work more hours you play less video games :)

Greater hours worked, fewer hours spent playing video games

What is { 3 x [ 10 −(2 x 3 )]}x2

Answers

Answer:

12x[tex]x^{3}[/tex]

See the image attached.

PZ PLZ PLZ HELP I DO NOT UNDERSTAND THIS KINDA OF STUFF IF U DONT KNOW DO NOT ANSWER IT I ACTUALLY NEED HELP NO LINKS PLZ PLZ

Answers

Answer:

176

Step-by-step explanation:

11x11=121

12x11=132

9=20-11

16-9=7

11x16=176

Hope this helped you :D

And pls give me brainlist if you can

The answer is 22 I can’t explain because then it would say incorrect answer

please help and answer right and I'll do whatever you want

Answers

Answer:

10 no

diameter=21 ft

radius=diameter/2

=21/2

=10.5 ft

circumference=2πr

=2*22/7*10.5

=65.94 ft

11 no

radius=diameter/2

=42/2

=21 milimeters

circumference=2πr

=2*22/7*21

=131.88 milimeter

13 no

circumference=2πr

=2*22/7*14

=87.92 cm

Step-by-step explanation:

The answer here would actually be 131.95 or 132 millimeters rounded

PZ PLZ PLZ HELP I DO NOT UNDERSTAND THIS KINDA OF STUFF IF U DONT KNOW DO NOT ANSWER IT I ACTUALLY NEED HELP NO LINKS PLZ

Answers

Hope this helps!... apparently I need 20 characters to and

Answer:

30

Step-by-step explanation:

This shouldn't be too bad. Further down it says that Mario is equivalent to Peach, which means that for the equation at the very top, we can divide 36 by 3. Mario = 12, Peach = 12. Mario divided by Toad = 2, which means that 12 divided by x = 2. We can invert the equation, and we get 2 times x = 12. x/Toad=6. Toad multiplied by Bowser is 0, so we can assume that Bowser is 0. And for the final equation, 12+0+12+6. The final answer is 30.

Hopefully that helped you understand these types of activities, have a nice day!

it will be a big help man or lady I don't know

Answers

Answer:

2160

Step-by-step explanation:

2,160 inches of cardboard

have a good day and good luck on ya homework

Distribute the negative number and simplify.

18x - (-3x +9)

Answers

21x-9 is the answer
21x -9 is the answer

please help please
e

Answers

Answer:

a) 4410

b) 4189.5

Step-by-step explanation:

To find the volume of the pool, multiply the length, width, and depth:

21*35*6=4410ft^3

95% capacity would be equal to 0.95*4410=4189.5ft^3

Answer:

A: 4410

B: 4189.5

Step-by-step explanation:

You want to multiply the length, width, and height

Find the median of the data set:

95, 90, 100, 90, 85, 95, 75

Answers

Answer:

meadian is 90 cuz 90 is in the middle

Step-by-step explanation:

hope this helps

Answer:

90.

Step-by-step explanation:

Hope this helped

I will reward brainliest please help

Answers

Answer:

KEF

The measure is the number that line K is on. I can't see it.

Step-by-step explanation:

my last points thx all of u :)

Answers

Answer:

Thank you so much, you are very nice! :0

Step-by-step explanation:

Answer:

SPREAD THE WORD QUEER IS BEAUTIFUL PROTEST AGINST BRAINLY

Step-by-step explanation:

TY BTW :)

Simplify this expression using the properties of powers

Answers

2h to the 6th power!!
2 to the 6th power is the correct one

Using the graph, what is one solution to the equation f(x) = g(x)?

Graph of function f of x equals 3 times x minus 1. Graph of function g of x equals x cubed minus 3 times x squared minus 4 times x plus 12.

x = 3.9
x = 1
x = 0.25
x = −2

Answers

Answer:

The answer is B

Step-by-step explanation:

Solution to the equation f(x) = g(x) is -2.4,1.4,3.9.

The correct option is (A).

What is equation?

A mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value.

given function is:

f(x)=3x-1, g(x)= x³-3x²-4x+12

As, f(x)= g(x)

3x-1=  x³-3x²-4x+12

x³-3x²-4x+12-3x+1=0

x³-3x²-7x+13=0

By looking the graph of these two functions, we could clearly see that the point of intersections of the equation.

The points of the intersection are -2.4,1.4,3.9.

learn more about equation here:

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Students and teachers at a school were asked if they preferred blue, green, red, or yellow. The table shows the results of the survey.

Answers

Answer:

A,B,F

Step-by-step explanation:

till me if am right or wrong

Will mark brainlist and please show your work!

Answers

It’s A bc 228/3 is 76 and the rest of the answers seems like it wouldn’t be the correct answer.(I apologize if I’m wrong)

louis will spend $755.00 on a new kitchen sink. He will use his credit card to widthdraw $800 cash to pay for the sink. The credit card company charges a $12.00 cash-widthdrawal fee and 4% interest on the borrowed amount, but not including the cash-widthdrawal fee. how much will louis owe after one month

Answers

Answer:

365$

Step-by-step explanation:

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