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
Sloan [31]
3 years ago
13

Find the area of of a regular octagon with side length 20 cm.

Mathematics
1 answer:
Alla [95]3 years ago
8 0

A=2(1+\sqrt{2})a^2=2·(1+\sqrt{2})·20^2≈1931.37085cm²

You might be interested in
Which of the following sets represents a function?
Mariulka [41]
<span>{(1, 2), (3, 2), (5, 7)} is a function

</span>
7 0
3 years ago
2(x - 3) = 2x + 5? Need Help Now
nydimaria [60]

Answer:  it has no solutions

Step-by-step explanation:

if im wrong i owe u

8 0
3 years ago
Read 2 more answers
What is the value of x in the equation below?
zubka84 [21]
First you multiply 6(x) then you multiple 6(8)

Your equation should now look like this: 6x-48=72

Subtract 48 from both sides

Your equation should now look like 6x=120

Divide by 6

Answer is 20
7 0
2 years ago
PLEASE ANSWER!!!! ILL GIVE BRAINLY
irina1246 [14]

Answer:

Answer down below :)

Step-by-step explanation:

The volume of the rectangular prism is:

20 x 9 = 180cm^2

The volume of the triangular prism is

6 x 9 x 1/2 = 27cm^2

I'm sorry, that is all I can do, but the total volume would be 180 + 27 + the cylinder's volume. Have a nice day :)

7 0
2 years ago
Item 5 Item 5
olga_2 [115]

Answer: the value of the annuity when you retire is $130919

Step-by-step explanation:

We would apply the future value which is expressed as

FV = C × [{(1 + r)^n - 1}/r]

Where

C represents the yearly payments.

FV represents the amount of money

in your account at the end of 10 years.

r represents the annual rate.

n represents number of years or period.

From the information given,

r = 7% = 7/100 = 0.07

C = 20/100 × 47400 = $9480

n = 10 years

Therefore,

FV = 9480 × [{(1 + 0.07)^10 - 1}/0.07]

FV = 9480 × [{1.967 - 1}/0.07]

FV = 9480 × 13.81

FV = $130919

4 0
3 years ago
Other questions:
  • A formula calls for 0.6 mL of a coloring solution. Using a 10-mL graduate calibrated from 2 to 10 mL in 1-mL units, how could yo
    15·1 answer
  • Two congruent figures<br> have the same perimeter.<br> O sometimes<br> O Never<br> O Always
    9·1 answer
  • If you roll two dice what is the probability of rolling a total of 10
    12·2 answers
  • What is 59.69 in expanded form
    9·1 answer
  • Find the derivative of f(x) = negative 6 divided by x at x = 12.
    6·2 answers
  • Natalie picked 135 berries in 15 minutes. If she continues picking at that rate, how long will it take her to pick 486 berries?
    11·2 answers
  • Simplify each expression by combining like terms. <br>7a - 6 + 8a ​
    13·1 answer
  • I need help please. i give brainliest to whoever gets it right
    8·2 answers
  • What is the slope of the point (1÷4,3÷2)and (-1,-3)​
    11·2 answers
  • Which scatterplot most likely has a line of best fit represented by y=-2x-1?<br>NO LINKS PLS
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!