Mathematics Middle School

What is the area of a circle with a radius of 21 cm?
Group of answer choices
4348.08 cm2

1289.12 cm2

1384.74 cm2

Answers

Answer 1

Answer:

1384.74cm squared

Step-by-step explanation:

A= πr²

Answer 2
last one 1384.74 jajajajajajaja

Related Questions

Help pldssshdhhfhfhtj

the distannce fromm bbaseee to base, incluudding homess platee, on a baaaaseballlll fiellllld is 90 ft. the bases form a square.

If ulu hit a home run, how farrrrr do you have to runnnn to touchhhhhhb all the bases and returnnnnnn to home plateeeeeee​

Answers

as far as you cann bbb

You can help with both if you want I just need help

Answers

Answer:

1) 14.4

2)20

Step-by-step explanation:

find the scale factor. simplify your ratio to lowest terms. the original triangle is triangle lmn and the new one is triangle xyz

Answers

Answer:

5:2

Step-by-step explanation:

Triangle LMN's base length is 15 and triangle XYZ's base length is 6. Since they are both base lenghts, you can just use those numbers in a ratio and simply.

15:6

Divide both sides by 3 and you get 5:2!

what is the value of k?

Answers

Answer:

I think the answer is 2.. I'm sorry if its incorrect.

Step-by-step explanation:

ANSWER BOTH OF THEM PLEASE!!!
A. A car corporation produced 580 fewer cars this month than last.
Write a signed number to represent this month's change in production.

B. Debra's test score average increased by 4 points this semester.
Write a signed number to represent this change in average.

Answers

For the first one the answer is going to be 1300

How do I multiply fractions by fractions? (Ex: 1/2 X 7/10)

Answers

Answer:

7/20

Step-by-step explanation:

Just multiply the numerators with each other and then multiply the denominators

Steve walks a circular trail at the local park that is 440 yards in length (a quarter mile). The city council has built a fountain at the center of the circle. To the nearest yard, what is the shortest distance from the path to the center of the fountain?

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Answers

Step-by-step explanation:

circumference of a circle is

u = 2 pi r

u=440

r=?

solve for r

Calculate the distance Margo rides her bike if she rides 7\8 mile each day for 8 days.

Answers

Answer:

7

Step-by-step explanation:

7/8 ×8

=7/8 ×8

= 7 × 8

8 × 1

= 56/8

= 56 ÷ 8

8 ÷ 8

= 7

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If there are 23 students in your class, and your teacher is pulling random names from a hat, what is the probability that your name will be pulled on the third pull?
A) (1)/(23)
B) (3)/(23)
C) (3)/(21)
D) (1)/(21)

Answers

the answer for your question is A.

I need help with at least one with an explanation the one with best explanation earns brainliest keep in mind i'm 12 so can you like write it in a way i'll understand? plz and ty!

Answers

Area of a triangle is base x height so for the first one you would have to do:
A= 6x14
So area equals
84

Answer:

Triangle:

In order for you to solve all of them you need to multiply the base times the height then divide that in half.

example answer;

3 is 68 because you multiply 17 by 8 then divide in half.

Decomposition of the trapezoid to find the area. You first need to separate the parts of the trapezoid that make a triangles. Ex: separate the outer parts so that you're left with triangle/s and a rectangle/square shape in the middle. Find the area of the triangles and the area of the middle square/rectangle and then add that together.

8. 171 I used this formula A=(a+b)h/2  Which is top length+bottom length times height divided by two.

Trapezoid area:

You need to add the top base and the bottom base together then multiply that by the height.

9. 396. I  used the same formula as the last one. which is A=(a+b)h/2.

I hope I could help you :)

Step-by-step explanation:

what is the answer to this math n

Answers

Answer:

s = 16

Step-by-step explanation:

[tex]\frac{s}{4} +12=16[/tex]

step 1 subtract 12 from each side

12 - 12 cancels out

16 - 12 = 4

now we have [tex]\frac{s}{4}=4[/tex]

step 2 multiply each side by 4

[tex]\frac{s}{4} *4=s[/tex]

4 * 4 = 16

we're left with s = 16

PLEASE HELP ME PLEASEEE!!

Answers

Answer:

1200

Step-by-step explanation:

78 ÷ 6.5 = 12 x 100

sales = 1200

It’s the green sister:))

PLZZZZZZ HELP ME WITH THIS ITS DUE IN AN HOUR

Answers

f(x) 6 10 14 18 22

g(x) 1/9 1/3 1 3 9

I need help can you help

Answers

Answer:

Option 3, angle 2 is equal to 37 degrees

Step-by-step explanation:

Angle 2 is on the opposite side of the 37 degree angle, so it is also 37 degrees

Answer: Not enough information is given

Step-by-step explanation:

Data: Angle 4 is 37 degrees

Angle 1 is x degrees

Angle 2 is x degrees

Angle 3 is x degrees

It only shows us that the 1 and 3 or obtuse and 2 is acute

We don't know if the angles are Congruent so we cannot draw a conclusion about the size of any of the other angles

I hope this helps!

help pleasee
giving brainliest​

Answers

Answer:

the answer is the fourth one

Step-by-step explanation:

the canaanites practiced polytheism

The answer is the 4th one

Zahara asked the students of her class their gymnastic scores and recorded the scores in the table attached to the question

Based on the table, what is the mean gymnastic score?
2.5
3.5
5.2
9.4

// if you answer anything like "good luck", "i dont know", "who knows", "i posted the link to a hosting service" - i will go to your profile and report all of your answers.

Answers

Answer : 5.15
Explanation : I did the math
To find the mean add all of the numbers listed,then divide by how many total numbers there are.So 2.5+3.5+5.2+9.4=20.6 and if you divide that by how many numbers there are,4, you get 5.15

To qualify for the postcard rate for postage, a postcard must be less than 4 1/4 inches high. Elayne has a postcard that is 4 7/8 inches high. How much is her postcard over the height limit?

Answers

Answer:

5

Step-by-step explanation:

s0 obasically yah

5/8 inches

The postcard must be less than 4 1/4 inches high.
Elayne's postcard is 4 7/8 inches high.
We need to subtract the limit from the height of her postcard to know how high it is above the limit:
4 7/8 - 4 1/4 = 5/8
Her postcard is higher than the limit by 5/8 inches.

this one too keep saying it wrong

Answers

Hi

The answer is 50.24in^3

Hope this Helps

(Tell me if my answer is correct)

Answer:

V≈234.57

Step-by-step explanation:

This is the correct answer, try it!

What is the mean in statistics? HELP!

Answers

Answer:

add all your data and divide by n.

Step-by-step explanation:

example: 1,2,3 1+2+3=6. 6/3=2 the mean is 2.

Answer:

The mean is the average or the most common value in a collection of numbers. In statistics, it is a measure of central tendency of a probability distribution along median and mode. It is also referred to as an expected value.

Step-by-step explanation:

Mean is an essential concept in mathematics and statistics. The mean is the average or the most common value in a collection of numbers.

How to calculate mean?

There are different ways of measuring the central tendency of a set of values. There are multiple ways to calculate the mean. Here are the two most popular ones:

 

Arithmetic mean is the total of the sum of all values in a collection of numbers divided by the number of numbers in a collection. It is calculated in the following way:

The box plot below represents some data set. What percentage of the data values are greater than 42?

Answers

Answer:

25%

Step-by-step explanation:

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How do you solve this?

Answers

Not sure if you wanted answers or explanation on what to do. Ill just do the explanation and if you want the answers just lmk C:

R=1/2 d, and C=pi*2r. So you basically take the given number and plug it into these formulas.

Answer:

21. D = 5.67(rounded to the hundredths)

R = 2.84(rounded to the hundredths)

22. D = 13.4

C = 42.08(rounded to the hundredths)

23. C = 33.28(rounded to the hundredths)

R = 5.3

24. D = 1

R = 1.57 or pi/2

Step-by-step explanation:

Formula: C/pi = D

D = 2r

pi = 3.14

21. D = 17.8/3.14 = 5.67(rounded to the hundredths)

R = 5.67/2 = 2.84(rounded to the hundredths)

22. D = 6.7*2 = 13.4

C = 13.4 * 3.14 = 42.08 (rounded to the hundredths)

23. C = 10.6 * 3.14 = 33.28(rounded to the hundredths)

R = 10.6/2 = 5.3

24. D = 3.14/3.14 = 1

R = 3.14/2 = 1.57 or pi/2

plz help me i beg i will give brainlist and 20 points
Jin tried to find the circumference of the circle. FIND HIS ERROR AND CORRECT IT.

Answers

Answer:

His error is that he calculated it as diameter not radius

Step-by-step explanation:

C=2πr

=2(3.14)(5)

=31.4mm

Please mark as brainliest if answer is right

Have a great day, be safe and healthy  

Thank u  

XD  

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Answers

I believe the answer is 21

Dylan makes 3 submarine sandwiches. He cuts each sandwich into sixths to share. He stacks all the sandwich pieces on a plate. How many sandwich pieces does Dylan stack on the plate? Make sure to include the equation you used to help you solve this problem in your answer.

Answers

Answer:

18

Step-by-step explanation:

Each sandwich will be divided into 6 pieces. 1 sandwich equals 6 pieces, 2 sandwiches equals 12 pieces, so 3 sandwiches equals 18 pieces.

Answer:

It will be 18

Step-by-step explanation:

All you have to do is simple multiplication, 6 times 3 and you get 18

3 sandwiches and 6 pieces each.

The attic is a triangular prism. Insulation will be placed inside all walls, not including the floor. Find the surface area covered by insulation.

Answers

Answer: This is from 2021.. still need this answer...?

Step-by-step explanation:

What is the slope of this line?

Answers

Answer:

Using two of the points on the line, you can find the slope of the line by finding the rise and the run. The vertical change between two points is called the rise, and the horizontal change is called the run. The slope equals the rise divided by the run: Slope =riserun Slope = rise run .

Step-by-step explanation:

The slope is 5/2 or 5 over 2

Help please! Also don't comment if you don't know or you claim you'll 'send me the link'

Answers

Hey, I worked out the answer for your last problem but Brainly wouldn’t let me comment so I’m leaving it here. Here it is:

Which statement best explains why this expression is equal to 86.21?

43 + tt + 43⋅86.21

Answers

Answer:

c

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

12 12 14 18 20 20 21 21 21 23 23 box plot
determine which is right
a-q1 is 13
b-q3 is 21.5
c-iqr is 9
d-data has no outliers

Answers

I think the answer Is d- data has no outliers because there are no super big numbers or super small numbers. If that makes since

Tim and Stacy are volunteers who are helping with the town marathon. They're expecting 260 participants, but only 156 has have registered so far. What percent of the expected marathon participants have not registered for the competition?
1. 16.7%
2 .260%
3. 45%
4. 40%.
(whoever answers first will get a brainleist, a thanks, and a 5 star review)

Answers

Answer:

45%

Step-by-step explanation:

hope it helps,

The answer is number 3
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