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
PolarNik [594]
3 years ago
12

Find the area of a regular octagon with a radius of 20​

Mathematics
2 answers:
Reika [66]3 years ago
8 0

Answer:

Area   = 2 x Sqrt (2) x r^2

Area = 2 x sqrt(2) x 20^2

Area = 2 x 1.414  x 400

Area = 1131.37

Step-by-step explanation:

zaharov [31]3 years ago
5 0

1325.5

im not too sure, but i think that is the answer.

You might be interested in
Find the values of x and y - i will give brainliest if right
kherson [118]

Answer:

itd x=68 and y=5 I apolgize if its wrong

4 0
3 years ago
Phyllis invested $10,500 a portion earning a simple interest rate of 9(1/5)% per year and the rest earning a rate of 9% per year
Alenkinab [10]
Total investment  = $10,500

Let x = amount of first investment, and y the amount of the second investment.

First investment:
Interest rate = 9 (1/5)% = 0.092
Earned interest = 0.092x

Second investment:
Interest rate = 9% = 0.09
Earned interest = 0.09y

Total interest after one year is $957.00, therefore
0.092x + 0.09y = 957       
 or
1.0222x + y = 10633.33   (1)

Also,
x + y = 10500               (2)

Subtract (2) from (1).
0.0222x = 133.33
x = 6000
y = 10500 - x = 4500

Answer:
The first investment is $6,000 at 9 (1/5)% rate;
The second investment is $4,500 at 9% rate.

7 0
3 years ago
Please help ASAP thank you
Eduardwww [97]

Answer:

R= 1 1/12 or 13/12 I think that's the simplest form

5 0
3 years ago
Read 2 more answers
The following graph shows the solution to which system of inequalities?
ANTONII [103]

Looking at the purple area, we see that 1≤y≤3. So we can immediately reject answers (d), (a).


Since the purple area is to the right of and above the sloping line, we choose answer (c).


The correct answer to the whole problem is (c).

4 0
3 years ago
Read 2 more answers
Jayden bikes 1.8 miles in 6 minutes. His friend Jordan bikes 3.2 miles in 8 minutes. Who bikes at a faster speed? Explain your a
Arlecino [84]

Answer:

Jordan

Step-by-step explanation:

Jayden bikes 0.3 miles in 1 minute if you divide 1.8 by 6.

Jordan bikes 0.4 miles in 1 minute if you divide 3.2 by 8.

Then, we can Jordan bikes 0.1 mile faster than Jayden in a minute.

7 0
3 years ago
Other questions:
  • Need help w algebra 2!!
    15·1 answer
  • Evaluate 2x^2+5x^2-5x^3 when x = 2
    7·1 answer
  • In the form of the matrice, how do you work out the following simultaneous equation?
    15·1 answer
  • How to find side of triangle if two sides and one angle is known?
    15·1 answer
  • What’s the answer the multiple choice is there to please don’t guess
    6·1 answer
  • Why is it important to describe the variable in an expression?
    15·2 answers
  • 5x - 4y = 34 find y when x= -3
    8·2 answers
  • Due Soon Need Help Geometry!
    9·1 answer
  • Work out the area of a rectangle with base, b =<br> 18mm and perimeter, P = 60mm.<br> b b
    15·1 answer
  • What are the steps for 2x+1=7
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!