1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nimfa-mama [501]
2 years ago
15

The perimeter of a circle=πr², where π=22/7. find the area of r=21cm ​

Mathematics
1 answer:
Serjik [45]2 years ago
7 0

EXPLAINATION:  \pi r^2=\frac{22}{7} .21^2=\frac{22}{7} .441=\frac{22.441}{7} =\frac{22.63.7}{7} =22.63=1386  

ANSWER: 1386 cm^2

Ok done. Thank to me :>

You might be interested in
Three times a number is no less than negative six.
tresset_1 [31]

the equation for the stated problem would be:

3x ≥ -6

3 0
3 years ago
Read 2 more answers
X-2y=18 2x+y=6 parallel perpendicular or neither
sergey [27]
<h3>Therefore they are perpendicular.</h3>

Step-by-step explanation:

A equation of line is

y =mx +c

Here the slope of the line is m.

Given equations are

x - 2y = 18

⇔-2y = -x +18

\Leftrightarrow y =\frac{1}{2} x -9............(1)

and 2x + y = 6

⇔y = -2x +6 ............(2)

Therefore the slope of equation (1) is(m_1)= \frac{1}{2}

Therefore the slope of equation (2) is(m_2)= -2

If two lines are perpendicular, when we multiply their slope we get -1.

therefore,

m_1. m_2 =\frac{1}{2}. (-2) = -1

Therefore they are perpendicular.

4 0
3 years ago
A robot can complete 8 tasks in 5/6 hour. Each task takes the same amount of time.
ludmilkaskok [199]

Answer:

A. 6.25

B. Nine tasks

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Ellis is painting wooden fenceposts before putti by then in his yard. They are each 5 feet tall and have a diameter of 1 foot. T
lawyer [7]

Answer:

39.25

Step-by-step explanation:

diameter. is 1 therefore radius is 1/2

formula is πr²h

where

h is height=5

=3.14x½²x5

=3.925 for one paint

therefore for 10 paints, we have

=3.925x10

=39.25

3 0
2 years ago
Pls help me with this
Julli [10]

Answer:

8125, im pretty sure this is right

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Look At picture! Below!
    8·1 answer
  • If 4 bunnies can eat all the crops in a garden in 10 hours, how long will it take 5 bunnies to eat the same crops?
    6·2 answers
  • Jessica spent $36.07 and Ben spent $7.79 at the grocery store. Which is the best estimate of how much Jessica and Ben spent toge
    12·2 answers
  • M-x=p+n, for x<br><br>how do i solve step by step
    5·1 answer
  • Find the dimensions of the open rectangular box of maximum volume that can be made from a sheet of cardboard 21 in. by 12 in. by
    6·1 answer
  • n your notebook, set up the following subtraction in a vertical format and select the correct answer. Reduce 7y + 2y 2 - 7 by 3
    13·1 answer
  • Use the substitution method to solve the system of equations. Choose the
    5·2 answers
  • Which of the following questions are true? Select two that apply.
    12·1 answer
  • Need help in my quiz bc I want to passsss pls send helps
    13·1 answer
  • Zack uses fruits and nuts to make a trail mix . He uses 2 cups of fruit every 3 cups of nuts
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!