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
OlgaM077 [116]
2 years ago
12

Find the area of a regular octagon with

Mathematics
1 answer:
vodka [1.7K]2 years ago
5 0

Answer:

Step-by-step explanation:

Area=2(1+\sqrt{2})8²

       =309.0(round to nearest tenth)

You might be interested in
Suppose that one person in 10,000 people has a rare genetic disease. There is an excellent test for the disease; 98.8% of the pe
nirvana33 [79]

Answer:

A)The probability that someone who tests positive has the disease is 0.9995

B)The probability that someone who tests negative does not have the disease is 0.99999

Step-by-step explanation:

Let D be the event that a person has a disease

Let D^c be the event that a person don't have a disease

Let A be the event that a person is tested positive for that disease.

P(D|A) = Probability that someone has a disease given that he tests positive.

We are given that There is an excellent test for the disease; 98.8% of the people with the disease test positive

So, P(A|D)=probability that a person is tested positive given he has a disease = 0.988

We are also given that  one person in 10,000 people has a rare genetic disease.

So,P(D)=\frac{1}{10000}

Only 0.4% of the people who don't have it test positive.

P(A|D^c) = probability that a person is tested positive given he don't have a disease = 0.004

P(D^c)=1-\frac{1}{10000}

Formula:P(D|A)=\frac{P(A|D)P(D)}{P(A|D)P(D^c)+P(A|D^c)P(D^c)}

P(D|A)=\frac{0.988 \times \frac{1}{10000}}{0.988 \times (1-\frac{1}{10000}))+0.004 \times (1-\frac{1}{10000})}

P(D|A)=\frac{2470}{2471}=0.9995

P(D|A)=0.9995

A)The probability that someone who tests positive has the disease is 0.9995

(B)

P(D^c|A^c)=probability that someone does not have disease given that he tests negative

P(A^c|D^c)=probability that a person tests negative given that he does not have disease =1-0.004

=0.996

P(A^c|D)=probability that a person tests negative given that he has a disease =1-0.988=0.012

Formula: P(D^c|A^c)=\frac{P(A^c|D^c)P(D^c)}{P(A^c|D^c)P(D^c)+P(A^c|D)P(D)}

P(D^c|A^c)=\frac{0.996 \times (1-\frac{1}{10000})}{0.996 \times (1-\frac{1}{10000})+0.012 \times \frac{1}{1000}}

P(D^c|A^c)=0.99999

B)The probability that someone who tests negative does not have the disease is 0.99999

8 0
3 years ago
La factorización de la expresión 33x^2-34x+8 es (3x-2)(11x-4)
USPshnik [31]

Answer:

B i think

Step-by-step explanation:

8 0
2 years ago
Who can help me with 17 and 18
nikklg [1K]

Answer:

correct statements in Q no. 17 are;

  • 0.1 < 0.125
  • 0.125 > 0.12

Answers for Q no. 18;

  • 4.19
  • 4.2

Step-by-step explanation:

8 0
2 years ago
I need help to solve it
Sidana [21]

Answer:

She will earn £9.01 per hour after the pay rise

Step-by-step explanation:

Here, we want to calculate a value, given the percentage of the pay rise

From the question, the percentage is 6%

The pay rise is thus;

8.50 + 6% of 8.50

= 8.50 + (6*8.5)/100

= 8.50 + 0.51

= £9.01

4 0
3 years ago
Sophia has $91,000 in a savings account that earns 7% annually. The interest is not compounded. To the nearest cent, how much wi
USPshnik [31]

Answer:

$95777.5

Step-by-step explanation:

change 7% to decimal = .07

91,000 * .07 = 5370 (annual interest)

5370 / 12 = 530.83 (monthly interest)

530.83 * 9 = 4777.5 (9 months interest)

91,000 + 4777.5 = 95777.5 (initial + 9 months interest)

6 0
3 years ago
Other questions:
  • Please help me with this question!! fast
    7·2 answers
  • 45 children attend preschool. The number of two-year-olds is one half the number of three-year-olds. The number of four-year-old
    11·1 answer
  • The coach buys boots for 36$ and socks for 9$ for each player on the team. There are 9 players. What is the total cost
    9·1 answer
  • Easy question :)
    10·1 answer
  • First equation x-y=8<br> second equation x+y=6
    11·1 answer
  • Convert the repeating decimal to a rational number 0.4000
    7·2 answers
  • Please solve for x z=m+x
    12·1 answer
  • I don't know how to graph y=6/5x+1<br> can someone help me?
    13·1 answer
  • Yesterday, 20 employees in an office were absent. If these absentees constitute
    12·1 answer
  • Find the value of x and y please
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!