A regular decagon has a radius of 8 cm.

What is the approximate area of the decagon? Recall that a decagon is a polygon with 10 sides.

188 cm2
198 cm2
304 cm2
375 cm2

Answers

Answer 1

Answer:

188cm^2

Step-by-step explanation:

Answer 2

A regular decagon has ten sides. Therefore, a decagon with radius of 8 cm has an approximate area of 188 cm²

What is a decagon?

A decagon is a polygon with 10 sides.

Therefore, the approximate area of a decagon can be found as follows:

area of decagon =  r²sin(360/n) / 2 × 10

where

r = radius

n = number of sides

Therefore,

r = 8 cm

area of decagon = 8² sin (360/ 10) / 2 (10)

area of decagon = 64 sin 36 / 2 × 10

area of decagon = 64 × 0.58778525229 / 2 × 10

area of decagon = 37.6182561467 / 2 × 10

area of decagon = 18.8091280734 × 10

area of decagon = 188 cm²

learn more on decagon here: https://brainly.com/question/27314677


Related Questions

Question 1 of 10
Look at this table.
Hours of
Training
10
20
30
40
50
60
70
Monthly
Pay
1250
1400
1550
1700
1850
2000
2150
According to the table, how many hours of training would you
need to have a monthly pay of $2450?

Answers

Answer:

90 hours of training would you need to pay

Answer:

90hours

Step-by-step explanation:

Addition of 10 hours= Addition of 150$

an=a+(n-1)d

2450=1250+(n-1)(150)

120/15=n-1

8+1=n

n=9

and 9x10=90 (each n=10hours)

Thus:

B. 90 hours

Brianliest please

Adam builds model rockets. Where he lives, his backyard is 12 feet below sea level. When he ignites his rocket, it flies a maximum of 350 feet straight up into the air before releasing its parachute. What is the altitude of Adam’s rocket at its highest point, as measured from sea level

Answers

Answer:

338 feet

Step-by-step explanation:

350 - 12 = 338

During a sale, a store offered a 20% discount on a stereo system that originally sold for $320. After the sale, the discounted price of the stereo system was marked up by 20%.

Answers

Answer:

354 $ is correct

Step-by-step explanation:

your v id dead

cept WHP
There is a line whose y-intercept is -2 and whose slope is 10. What is its equation in
slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
y =

Answers

y = 10x - 2
A simple task as the gradient and intercept were given

The length of the base of an isosceles triangle is x. The length of a leg is 3x−7. The perimeter of the triangle is 77. Find x.

Answers

Answer: x=13


Step 1: Define isosceles triangle

In an isosceles triangle, two sides and angles are equal. The equal sides will be the legs.

Step 2: Write an equation

To write an equation we must first consider the information discussed in step 1. Since we know that the legs will be equal, we will add that to the equation twice. The base and legs will be on one side of the equation, and the perimeter will be on the other. Now we can write the equation!

x+3x-7+3x-7=77

Step 3: Combine like terms

Like terms are terms that share the same variable, or lack of. Let’s add/subtract these now.

x+3x-7+3x-7=77
7x-14=77

Step 4: Solve for x

Let’s do the last part of the equation and solve for x, our final answer.

*Rewrite equation*
7x-14=77
*Add 14 to both sides*
7x=91
*Divide 7 on both sides*
x=13

This is your answer. Hope this helps! Comment below for more questions.

Representa en lenguaje algebraico el siguiente enunciado: La mitad de un número aumentado en seis unidades

Answers

A: because I get it right

Given(a*b)*c=a*(b*c) what property does this represent

Answers

Answer:

The associative property allows us to change groupings of addition or multiplication and keep the same value. (a+b)+c = a+(b+c) and (a*b)*c = a*(b*c).

Step-by-step explanation:

in mathematics, either of two laws relating to number operations of addition and multiplication, stated symbolically: a + (b + c) = (a + b) + c, and a(bc) = (ab)c; that is, the terms or factors may be associated in any way desired.

Answer:

Associative

Step-by-step explanation:

Question 3 of 10
of the way from
What is the location of the point on the number line that is
A = 5 to B = 23?
O
A. 8
B. 9
C. 10
D. 7

Answers

Answer:

B. 9

Step-by-step explanation:

solve it and u will find out

A and B are the subsets of a universal set U. If U = {1,2,3,4,5,6,7,8,9,10} A={1,2,3,5,7,9} and B ={1,2,3,6}, show that AUB complement=AΠB complement

Answers

Answer:

AUB= {1,2,3,5,6,7,9}

AnB={1,2,3}

Work out angle bxc give a reason for each angle you work out

Answers

Answer:

is there a pic to go along?

Step-by-step explanation:

? i need a pic

Bal Bharti Vidyalaya is located in the Karauli district of Rajasthan. The school decided to go for a plantation drive for 2 days on the occasion of Vanmahotsava. The Principal of the Vidyalaya asked the forest department to provide plants. It was decided that each student has to plant an equal number of trees on both days. On the first day, all the participants planted 5 trees each. The number of boys and girls who participated was in the ratio 5:4. (i) If the number of trees planted by the students on the first day was 5400, how many boys participated? [1] (ii) Find the total number of students who participated in this program? [1] (iii) If the total number of trees planted on the second day was 7560, then how many trees were planted by each one of them

Answers

Answer:

i). 600 Boys

ii). 1080 Students

iii). 7 Trees each students On Second day

Step-by-step explanation:

According to the Question,

Given, Bal Bharti Vidyalaya is located in the Karauli district of Rajasthan. The school decided to go for a plantation drive for 2 days on the occasion of Vanmahotsava. The Principal of the Vidyalaya asked the forest department to provide plants. It was decided that each student has to plant an equal number of trees on both days. On the first day, all the participants planted 5 trees each. .The number of boys and girls who participated was in the ratio of 5x:4x.

i).  If the number of trees planted by the students on the first day was 5400.

We Know, Each Student Has Planted 5 Plants on First day So, Girls And Boys Ratio are 5x : 4x , Thus Total Students Are 9x .

NOw, This 9x Planted 9x × 5 ⇒ 45x Trees on First Day.

45x = 5400 ⇔ x=120

So, The Number Of Boys Are 5x = 5 * 120 ⇒ 600Boys

And, The Number of Girls Are 4x = 4 * 120 ⇒ 480Girls

ii).  the total number of students who participated in this program is 600 boys + 480 Girls = 1080 Students.

iii). If the total number of trees planted on the second day was 7560. We Know Every Student Plant Equal Number Of trees on each day.

So, 1080 Students Planted 7560 Plants

Therefor, each Student Planted 7560/1080 = 7 Trees Each On Second day.

Square root of 556516 by long division method.​


Please any Mathematics Moderator:(


Help me please!:(

Answers

Step-by-step explanation:

hear is your answer but I am not moderator

answer is 746

Help me to do this question plz ​

Answers

2x+10 = x+25 (being vertically opposite angle)

2x-x = 25-10

x = 15

Answer:

x = 15

Step-by-step explanation:

The 2 angles are vertical angles and congruent, then

2x + 10 = x + 25 ( subtract x from both sides )

x + 10 = 25 ( subtract 10 from both sides )

x = 15

2. Based on the cash flows shown in the chart below, compute the IRR and MIRR for Project Erie. Suppose that the appropriate cost of capital is 12 percent. Advise the organization about whether it should accept or reject the project.

Project Erie

Time 0 1 2 3 4 5

Cash Flow $12,000 $2,360 $4,390 $1,520 $980 $1,250


Answers

Answer:

IRR = -5.19%

MIRR =  3.33%

The company should reject the project

Step-by-step explanation:

Internal rate of return is the discount rate that equates the after-tax cash flows from an investment to the amount invested

IRR can be calculated with a financial calculator

Cash flow in year 0 = -$12,000

Cash flow in year 1 = $2,360

Cash flow in year 2 =  $4,390

Cash flow in year 3 = $1,520

Cash flow in year 4 = $980

Cash flow in year 5 = $1,250

IRR = 5.19%

The modified internal rate of return is a capital budgeting method used to determine the profitability of an investment. The MIRR assumes that cash inflows are reinvested at the firm's cost of capital and outflows are financed at the firm's financing cost.

MIRR = (Future value of a firm's cash inflow / present value of the firm's cash outflow)^ (1/n)  - 1

n = number of years

present value of the firm's cash outflow = $12,000

Future value of a firm's cash inflow

Future value of year 1's cash flow = $2,360 x (1.12^4) = $3,713.51

Future value of year 2's cash flow =$4,390 x (1.12^3) = $6167.63

Future value of year 3's cash flow =$1,520  x (1.12^2) = $1906.69

Future value of year 4's cash flow = $980 X 1.12 = 1097.60

Future value of year 5's cash flow = 1250

Add the future values together = $14,135.43

($14,135.43 / $12,000)^0.2 - 1 = 3.33%

The project should be rejected because the IRR is negative.  

To find the IRR using a financial calculator:

1. Input the cash flow values by pressing the CF button. After inputting the value, press enter and the arrow facing a downward direction.

2. After inputting all the cash flows, press the IRR button and then press the compute button.  

In the right triangle shown in the diagram below,
what is the value of x to the nearest whole number?

Answers

Answer: (3) 21

Step-by-step explanation: 20.78 rounded to 21


What is the value of the expression below?

2[3(4+1)]-2

Answers

Answer:

28

Step-by-step explanation:

2[3*5]-2

2*15-2

30-2

28

Describe the pattern and determine what the next number in pattern 6,1,-4,-9,-14 , ?

Answers

Answer:

i subtract 5 from each term

Step-by-step explanation:

6 - 1 = 5

1 - (-4) = 5

-4 - (-9) = 5

-9 - (-14) = 5

edited:

next number: -19

-14 - 5 = -19

hope this helped!

minus 5 every time is the pattern

Please help me lovee<3

Answers

It is b yes she was right

help me..........
only 12......​

Answers

Answer:

Step-by-step explanation:

Step-by-step explanation:

the answer is in the image above

Which expressions are equivalent
27x/9x

Answers

Answer:

3x

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

You have [tex]\frac{27x}{9x}[/tex]

You can factor out the x in the numerator and denominator to get [tex]\frac{27}{9}[/tex]

You can further simplify this by factoring out a 9 => [tex]\frac{3(9)}{(9)}[/tex]

Thus getting 3

complete the table of values for y=2x+3

Answers

ANSWER:
x: -2, -1, 0, 1, 2
y: -1, 1, 3, 5, 7
:)

find the Hcf of 15 30 90​

Answers

Answer:

15=3*5

30=5*6

90=5*3*5*2*3

So, HCF=15

Step-by-step explanation:

Hope it helps

Step-by-step explanation:

Hey there!

HCF stands for highest common factor. When you are asked about to find the HCF of any number find the factors and take common from all the factors of the numbers.

The given numbers are: 15,30,90.

15 = 3*5

30 = 2*3*5

90 = 2*3*3*5

Now, from the above solutions take all the common factors.

From the factors of all three numbers, 3*5 are common.

Therefore, the HCF of the numbers is 3*5 = 15.

Hope it helps!

I need help........... ​

Answers

Answer:

4

Step-by-step explanation:

Break down the shape into a rectangle and a triangle

To find the base of the triangle subtract

(3x-1)-(x+1)= 2x-2

which means the area of the triangle is

.5(2x-2)(x-1)= x²-2x+1

Let's then find the area of the rectangle

(x+1)(x-1)= x²-1

Take the sum and set this equal to 40

(x²-2x+1)+(x²-1)=40

simplify...

2x²-2x-40=0

x²-x-20=0

(x-5)(x+4)=0

Reject the negative answer and get x=5

Then it's just a matter of plugging in x=5 for the height (x-1)

5-1=4 which is the final answer

Answer:

4 cm.

Step-by-step explanation:

Area formulas:

A(Rectangle) = bh

A(Triangle) = 1/2bh

A(Trapezium) = A(Rectangle) + A(Triangle)

Use the information given and substitute the values to solve for the missing height:

A(Rectangle) + A(Triangle) = A(Trapezium)

bh + 1/2bh = 40

(x + 1)(x - 1) + 1/2(2x - 2)(x - 1) = 40

x² - 1 + x² - 2x + 1 = 40

2x² - 2x = 40

2x² - 2x - 40 = 0

Use Quadratic Formula to solve for x:

a = 2, b = -2, c = -40

x = (-b ± √(b² - 4ac))/2a

x = (-(-2) ± √((-2)² - 4(2)(-40)))/2(2)

x = (2 ± 18)/4

x = 5 and x = -4

Since we cannot have a negative height, we use x = 5:

h = (5) - 1 = 4

Therefore, the height of the trapezium is 4 cm.

PLEASE HELP QUICKLY LIKE IN THE NEXT 5 mins plz !!) The function MX) = -x - 4x + 5 is shown on the graph.
Which statement about the function is true?
12
(-2,9).
O The domain of the function is all real numbers less
than or equal to -2
O The domain of the function is all real numbers less
than or equal to 9
The range of the function is all real numbers less
than or equal to -2.
The range of the function is all real numbers less
than or equal to 9.
12
12
-10

Answers

Step-by-step explanation:

you did not show us the graph, and your problem description is a bit gibberish - I am sure there are some important parts missing.

therefore it is impossible to answer this.

!!I NEED AN ANSWER QUICKLY!!

Answers

Answer:

Step-by-step explanation:

Ans:A.

6×5÷2×11=165

Answer:

A

Step-by-step explanation:

The volume (V) of the tent is calculated as

V = Al ( A is the area of the triangular end and l is its length )

A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )

Here b = 5 and h = 6 , so

A = [tex]\frac{1}{2}[/tex] × 5 × 6 = 15 ft² , then

V = 15 × 11 = 165 ft³ → A

The pair of triangles below have two corresponding parts marked as congruent. What additional information is
needed for a HL congruence correspondence?

A. ∠M≅∠H
B. LM≅JK
C. LM≅JH
D. LN≅JK
(there is a line above the letters besides a)

Answers

Answer:

C. LM ≅ JH

Step-by-step explanation:

The criteria that needs to be satisfied before two right triangles can be said to be congruent to each other is by the Hypotenuse-Leg Theorem are:

1. Both must have a corresponding leg that are congruent to each other.

In the diagram given above, NM is congruent to KH. They are corresponding legs that are congruent.

2. The hypotenuse of one triangle must be equal to that of the other.

We are not given if the hypotenuse of one, LM is congruent to the hypotenuse of the other, JH.

Therefore, the additional information required would be:

LM ≅ JH

how to find the area of triangle?​

Answers

Answer:

[tex](i). \\ { \tt{area = 2(\frac{1}{2} \times base \times height}} )\\ = 4 \times 3 \\ = 12 \: sq \: units \\ \\ (iii). \\ = \frac{1}{2} \times 8 \times 6 \\ = 24 \: sq \: units \\ \\ (ii). \\ = \frac{1}{2} \times 12 \times 5 \\ = 30 \: sq \: units[/tex]

seratus di tambah dua puluh berapa?​

Answers

Answer:

120

Step-by-step explanation:

▶️ Penyelesaian:

100

20 +

120 ✅

Answer:

what?

Step-by-step explanation:

Helppppppppp meeeeeeeeeeeeeeee

Answers

Answer:

x = 16

Step-by-step explanation:

(5x + 14)° + (x + 19)° + (2x + 19)° = 180°

8x + 52 = 180

8x = 128

x = 16

find the area of the circle use 3.14 for it d = 10 cm a = ? cm^2

NO TROLLS TY

Answers

Answer:

78.5 cm²

Step-by-step explanation:

GIVEN :-

Diameter of the circle (d) = 10 cmπ = 3.14

TO FIND :-

Area of the circle (a)

FORMULAES TO BE USED IN THIS QUESTION :-

[tex]Radius = \frac{Diameter}{2}[/tex][tex]Area = \pi \times (Radius)^2[/tex]

SOLUTION :-

[tex]Radius\: (r) = \frac{Diameter}{2} = \frac{10}{2} = 5 cm[/tex]

[tex]=> Area = \pi r^2[/tex]

               [tex]= 3.14 \times (5)^2[/tex]

               [tex]= 3.14 \times 25[/tex]

               [tex]= 78.5 \: cm^2[/tex]

               

Other Questions
can someone help asap!! According to the Unit, successful readers:0000try to relate their own experiences to what they are reading.decide what information in a text is important and focus on it!self-monitor their own comprehension.All of the choices are correct. Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 181000 dollars. Assume the standard deviation is 31000 dollars. Suppose you take a simple random sample of 60 graduates.Find the probability that a single randomly selected policy has a mean value between 172595.6 and 196608.1 dollars.P(172595.6 < X < 196608.1) = (Enter your answers as numbers accurate to 4 decimal places.)Find the probability that a random sample of size n=60 has a mean value between 172595.6 and 196608.1 dollars.P(172595.6 < M < 196608.1) = (Enter your answers as numbers accurate to 4 decimal places.) Think about your family life and compare it to that of your grandparents. In what ways is it different? What factors do you think have produced any differences you perceive? what is your biggest takeaway on that subject? essay about my traditional festival in French IlusWhat are the gross sales?Income StatementFor the Year Ended August 31, 2012RevenuesStudent Lessons$29,520.00Recital Sales15,900.00Total Revenues:45,420.00ExpensesCostumes and AccessoriesBuilding MaintenanceTotal Expenses:16,700.0011,320.0028,020.00*Call numbers in 000s) If each metal is hit with light at the minimum wavelength, can I vary the intensity of the light to start emitting electrons? Yes or no? Explain Triangle ABC is the image of triangle ABC after a sequence of transformations which sequence of transformations could have been applied 13-?=7-2xIn the equation above what must ? be so that x has value of 2 1. The first person to observe cells was? A car left the house traveling north at 10 A.M. Another car left the house traveling south two hours later. If the cars traveled at the same rate and were 550 miles apart at 4 P.M , what was the rate of each car. Which subatomic particle has the least mass?O electronO protonO neutronO the atom 10. What are the coordinates of point on the directed segment from A(2,-3) to B(8,-6) thatpartitions the segment such that AC:CB is 4:2?(1) (6,-5)(3) (2,0)(2) (-2, 2)(4) (1, 1) What is the monthly net income?? Show work plz A farmer makes a rectangular enclosure for his animals.He uses a wall for one side and a total of 72 metres of fencing for the other three sides.The enclosure has width x metres and area A square metres.Show that A = 72x - 21. Though Japan's imperial system is thousands of years old, Japanese emperors had very little power during the 17th, 18th, and 19th centuries. In 1867, a series of events known as the Meiji restoration returned control of Japan to its emperor. Powerful Japanese emperors led a modernization program in Japan that allowed it to become wealthy and powerful during the 20th century. The Japanese Empire used its military power to conquer Korea, Vietnam, parts of China, and other territories in Southeast Asia during this period. During World War II, Japan fought as one of the Axis powers but was forced to surrender after the United States dropped two atomic bombs on Japanese cities. Though the United States considered ending the imperial system entirely, it eventually allowed the emperor to remain in place. However, his power was greatly reduced, and present-day Japanese emperors serve ceremonial roles instead of being political leaders. What is one example of continuity described in the passage? Paano makatutulong sa pangdaigdigang pagkakaisa ang matapat sa batas ukol sa kaligtasan,pangkalinisan at pangkapayapaan Which of the following describes federalism?A strong loyalty to a state or region, sometimes at the expense of a nationThe idea that the us constitution periodically can be updated or changed The idea that a state could refuse to follow a federal law it disagreed with A system that divides power between national and state governments the measures of the angles of a triangle are shown in the figure. solve for x