Find an area of a circle if the diameter of the circle is 40 cm

Find An Area Of A Circle If The Diameter Of The Circle Is 40 Cm

Answers

Answer 1
the A will be 1256.64cm 2
Answer 2

Answer:

1256cm^2

Step-by-step explanation:

The area of a circle is πr^2.

The radius is half of the diameter, so it's 20 cm.

A=3.14*(20cm)^2

A=3.14*400cm^2

A=1256cm^2


Related Questions

can anyone help me please

Answers

Answer:

orange :P

Step-by-step explanation:

volume = a x a x a = 15 x 15 x 15 =3375 cubic mm

Answer:

3375 cm (so the 3375 with the 3 in the corner)

DONT PUT THE ONE WITH THE 2 IN THE CORNER. Put the one with the 3 in the corner. I have made this mistake too many time lol.

Work:

Given, side of a cube =15 cm

Volume of a cube = Length x Width x Height

A cubes length, width, and height are the same.

15×15×15=3375 cm squared  

 

The trampoline park charges a $8 for kids and $4 for adults. Your extended family is going there to celebrate your birthday. Your family has at most $190 dollars to spend on entrance fees. You can invite at most 35 people. What are some possible combinations of adults and kids who could go to your party? Write a system of equations for this situation.

Answers

Answer:

The answer is below

Step-by-step explanation:

Let x represent the number of kids and y represent the number of adults that can be invited to the park.

Since the family has at most $190 to spend, hence:

8x + 4y ≤ 190    (1)

Also, the maximum number of invites is 35 people. This is represented by the equation:

x + y ≤ 35       (2)

Graphing equation 1 and equation 2 using geogebra online graphing

We have the solution as:

(0, 35), (23.75, 0) and (12.5, 22.5)

Since the number of people must be a whole number, the possible solutions are:

0 children and 35 adults or 23 children and 0 adults or 12 children and 22 adults

Name a pair of adjacent angles and a pair of vertical angles in the figure

Answers

Answer:

Adjacent: <ABC and <CBD

Vertical: <ABC and <EBD

Step-by-step explanation:

Adjacent angles: Angles that share one ray.

Vertical Angles: Opposite angles created by the intersection of two lines.

Hope this helps!!

After how many seconds ,t, will the object be 75 meters above the ground

Answers

Answer:

It will be above the ground in C

Step-by-step explanation:

A gym charges a one-time fee of $60 to join and membership dues of $25 per month
Part A
Complete the table to show how the total cost in dollars, C, and the number of months, m, of gym membership are related. Drag numbers to
complete the table. Numbers may be used once or not at all.
865
200
410
205
135
75
505
260
ות
3
8
14
C
Part B.
Which equation represents the total cost based on the number of months of gym membership?
O А.
C = 25m
B В.
C = 60 + 25m
Review progress
Question 5
of 22
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Answers

Answer:

Step-by-step explanation:

C=25m plus 75

3k is an example of?

Answers

3k is an example of Variable

Answer:

3k would be an example of a veriable.

What are the solutions of the equation (5x − 2)(x + 6) = 0?

A. 0.4, −6
B. no real solution
C. −0.4, 6
D. 2.5, −6

Answers

Answer:

A. 0.4 , -6

Step-by-step explanation:

equate each of them to 0

5x - 2 =0 , x + 6 = 0

5x = 2 , x = 0 - 6

x = 2/5 , x = -6

x = 0.4 , x = -6

what is 8690 rounded off to the neareset hundred?
am just asking​

Answers

Answer:

8700

Step-by-step explanation:

If it is 8,690 and you round to the nearest hundred it would add one to 90 making it 8,700

Answer:

Did not necessarily round up or down, but to the hundred that is nearest to 8690.

8690 rounded to the nearest hundred is: 8700

The volume of the following figure is
240 in² which of the following is the missing side length?
A. 7 in
B. 6 in
C. 8 in
D. 5 in

Answers

Answer:

B cause it same

Step-by-step explanation:

If am wrong correct me thanks

Please please help me if you can I really need it
If you can please answer all of the questions
They should be simple if you know basic geometry
Thank you so much

Answers

Answer:

1- c:25

2-cant help

3- A:2,8

4-cant help

Find the equation of the line parallel to y = 2/3x-7
passing through A(6,-1).

Answers

Answer:

y = 2/3x - 5

Step-by-step explanation:

If two lines are parallel, they have the same slope. This means the line we are looking for has a slope of 2/3. Since we are also given a point, we can start by writing the equation in point-slope form which is represented by

[tex]y-y_{1} =m(x-x_{1} )[/tex]

Where m is the slope and (x1, y1) is a point. We have both, so we can substitute the values and simplify:

y + 1 = 2/3 (x - 6)

y + 1 = 2/3x - 4

y = 2/3x - 5

An isosceles triangle has an angle that measures 120°. Which other angles could be in that isosceles triangle? Choose all that apply. 75, 50, 30, 25

Answers

Answer:

30.

Step-by-step explanation:

The 120 degree has to be the vertex angle.

The other 2 angles in the triangle will be congruent as the triangle is isosceles.

These 2 are both = (180-120) / 2

= 60/2

= 30 degrees.

plz help I need to finish this Geometry
How do you know what method (SSS, SAS, ASA, AAS) to use when proving triangle congruence?

Answers

It depends on what type of triangle you’re dealing with, and what is marked similar.

HELPPPPPPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE! asap

Answers

Answer:

209.25 ft²

Step-by-step explanation:

2.7cm * 5 = 13.5 ft

3.1cm * 5 = 15.5 ft

Area

a = 13.5 * 15.5

a = 209.25 ft²

Answer:

8.37cm

Step-by-step explanation:

2.7cm×3.1cm=8.37cm

Area rectangle is length by width


On this necklace the ratio of black beads to white beads is 1:3
How many more black beads do you need to add to make the
ratio of black to white 3:1?​

Answers

Answer:

8 more black beads.

Step-by-step explanation:

B=1

W=3

B:W = 1: 3

Make

B:W = 3:1 = 9:3

So we need (9-1) = 8 more black beads.

Answer: chupa verga maricon de mierda

Step-by-step explanation:

Graph the solution of 3x - 5<-8 or 2x – 7 >3.

Answers

Answer:

To be Honest I Really Don't know What are the Answers?

A) 3x -7 = 2x+5

3x-2x= 5+7

1x= 12

Resposta final: x=12 e so fazer sequindo o exemplo

Which of the following mapping diagrams does not represent a function?

Answers

Answer:

C

Step-by-step explanation:

C => 7 is mapped into both 8 and 12, and in a function, this is not allowed

Can someone help me?It's urgent and thank you!

Answers

Answer:

D. 5√10

Step-by-step explanation:

√40 + √90 = 2√10 + 3√10 = 5√10

Correct choice is D

The volume of a right rectangular prism can be found by finding the product 3(6)(12) Which expression could also be used to determine the volume of this prism? 36(6) 2(3 + 12 + 6) 4(3)(12) 12 + 6 +3​

Answers

Answer:

D

Step-by-step explanation:

PLEASE PLEASE HELP ME PLEASE PLEASSE

EXPLANATION = BRAINLIEST

ANSWER NEEDS TO BE IN SIMPLEST FORM

please help

Answers

Answer:

the answer will be r=48-3 your answer will be 45

Answer:

(6/5) π in^2 or 1.2 π in^2

Step-by-step explanation:

the area of a circle and the area of one circle sector are proportional.

Area of the circle = radius^2 * π = 3^2 π = 9π in^2

the hidden date is that the centre angle of a circumference is 360 degrees

we have now to use a proportion that has this meaning:

if the area is 9π in^2 when the angle is 360 degrees, what is the area when the angle is 48 degrees?

9π : 360 = x : 48

x = (48 *9π)/360 = (6/5) π in^2

Which of the following is an arithmetic sequence with a common difference of +3?
A) 17, 14, 11, 8, ...
B) 1, 3, 9, 12, ...
C) 4, 7, 10, 13, ...
D) 12, 15, 19, 24, ...

Answers

c.

4 + 3 7 + 3 1 0 + 3 1 3

Write the equation of the line passing through the points (-2,8) and (-8,2).

Answers

Answer:

y=-4x

Step-by-step explanation:

First, out it into y=mx+b. Then find the slope(m). insert slope and one set of coordinates into equation and solve for y-intercept (b). Then you have your answer.

Answer:

y = 1x + 10

Step-by-step explanation:

y2 - y1 / x2 - x1

2 - 8 / -8 - (-2)

-6/ -6

1

y = 1x + b

2 = 1(-8) + b

2 = -8 + b

10 = b

Help PLEASE!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

=22 m²

Step-by-step explanation:

Total area= Area of rectangle 1 + Area of rectangle 2

Find the surface area of a sphere
Show all the work

Answers

Answer:

452cm2

Step-by-step explanation:

surface area of sphere =4πr2

so 4π62 which equals to 452.39.

hope this helps u understand:)

Write the equation of the line in slope-intercept form

Answers

Equation in slope intercept form: y= -1/2x + 3

7. Find the volume of space consumed by the toilet paper without the center cylinder.
4cm
SHOW YOUR WORK!
*
14cm
12 cm
I
Volume

Answers

Answer:

7. 1583.36 cm³

8. 13,627.18 m³

Step-by-step explanation:

Volume of space consumed by the paper = volume of outer cylinder - volume of center cylinder

✔️Volume of Outer Cylinder:

Volume = πr²h

r = ½(12) = 6 cm

h = 14 cm

Volume = π*6²*14

Volume = 1583.36 cm³

✔️Volume of center cylinder:

Volume = πr²h

r = ½(4) = 2 cm

h = 14 cm

Volume = π*2²*14

Volume = 175.93 cm³

✅Volume of space of the toilet paper = 1583.36 - 175.93 = 1583.36 cm³

8. Volume of the solid = volume of the cone + volume of the cylinder

✔️Volume of the cone = ⅓πr²h:

r = 13 m

h = 14 m

V = ⅓*π*13²*14

V = 2,477.67 m³

✔️Volume of the cylinder = πr²h

r = 13 m

h = 21 m

V = π*13²*21

V = 11,149.51 m³

✅Volume of the solid = 2,477.67 + 11,149.51 = 13,627.18 m³

- Andrew gave half of his money to support a local charity. From what was left, he spent
$22.75 on a present for his sister. If he had $183.89 left over, how much did he have to
begin with?

Answers

Okay so basically you need to see what half of the amount he started with was to do that you need to add both of the numbers ^^^ = 206.64. Which is half of the starting number so you times by two. =$413.28

what do you call a line that intrrsects two parallel lines​

Answers

Answer:

Transversal

Step-by-step explanation:

A transversal is a line that passes through two lines in the same plane at two distinct points. 

Transversals play a role in establishing whether two or more other lines in the Euclidean plane are parallel.

Eight angles of a transversal.

Solve the following equation:
[tex]x + \sqrt{x+3} = 3 + 3\sqrt{1-x}[/tex]

Answers

Answer:

[tex]x+\sqrt{x+3}=3+3\sqrt{1-x}[/tex]

[tex]Remove~ Square ~root[/tex]

[tex]-36x^3+252x^2-540x+324=[/tex]

[tex]x^4-32x^3+286x^2-480x+225[/tex]

[tex]Now ~\mathrm{Switch\:sides}[/tex]

[tex]x^2-6x\sqrt{-x+1}-15x+18\sqrt{-x+1}+18=x+3[/tex]

[tex]\mathrm{Subtract\:}x^2-15x\mathrm{\:from\:both\:sides}[/tex]

[tex]x^2-6x\sqrt{-x+1}-15x+18\sqrt{-x+1}+18-\left(x^2-15x\right)=[/tex]

[tex]x+3-\left(x^2-15x\right)[/tex]

[tex]New ~Simplify[/tex]

[tex]-6x\sqrt{-x+1}+18\sqrt{-x+1}+18=-x^2+16x+3[/tex]

[tex]Subtract ~18~ from ~ both~ sides[/tex]

[tex]-6x\sqrt{-x+1}+18\sqrt{-x+1}+18-18=-x^2+16x+3-18[/tex]

[tex]Simplify[/tex]

[tex]-6x\sqrt{-x+1}+18\sqrt{-x+1}=-x^2+16x-15[/tex]

[tex]Now~ factor:[/tex]

[tex]-6x\sqrt{-x+1}+18\sqrt{-x+1}(-x+3)[/tex]

[tex]6\sqrt{-x+1}\left(-x+3\right)=-x^2+16x-15[/tex]

[tex]Solve~~-36x^{3}+252x^{2} -540x+324=x^{4} -32x^{3} +286x^{2} -480x+225=[/tex]

[tex]x=1,\:x=-3[/tex]

-----------------------hope it helps..have a nice day/night

Find sin
A. 3/5
B.4/5
C.1
D.5/4

Answers

Answer:

Sin < A is 4 / 5

Step-by-step explanation:

sin = Opposite side / Hypotenuse side

sin = 8 / 10

sin = 4 / 5

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