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
atroni [7]
3 years ago
11

Please help with khan academy!

Mathematics
2 answers:
sergiy2304 [10]3 years ago
6 0

Answer:

Let's imagine the image of the zoo.

The diameter is basically the length of the circle.

The penguin swam the radius.

To find the radius, we need to divide the diameter by 2.

The diameter is 20 meters.

20 \div 2 = 10 meters.

2 x pi x 10 = 62.83185307

62.83185307/2 = 31.41592654

Answer = 31.41592654

Cerrena [4.2K]3 years ago
3 0

Answer:

The distance through which penguin swim = 10π meters

Step-by-step explanation:

The island is given to be in a shape of circle and the distance around any circle is known as circumference.

The diameter of the island = 20 meters

So, to find the distance traveled by penguin we need to find the circumference or the circular island.

⇒ Circumference = π·diameter

⇒ Circumference = π × 20

                             = 20π meters

Now, it is given that the penguin only travels the half of the island So, the distance traveled by penguin is half the circumference of the island.

<u><em>Distance traveled by penguin = 1/2 × 20π = 10π</em></u>

The distance through which penguin swim = 10π meters

You might be interested in
Please help and explain very easy good luck
Mars2501 [29]

Answer:

-76

Step-by-step explanation:

A positive digit multiplied by a negative digit will result as a negative digit.

So,

6 · -8 = -48

Now if there is a problem where a number is added by a negative digit number, you turn the "plus" sign into a "negative" sign.

So,

- 48 + (- 28)

-48 - 28

If you subtract a negative by a negative, the answer will be negative BUT you have to ADD those two negative digits together and put the negative sign after.

- 48 - 28 = -76

7 0
3 years ago
Read 2 more answers
Required information An article presents a new method for timing traffic signals in heavily traveled intersections. The effectiv
Natasha2012 [34]

Answer:

652.6-2.01\frac{311.7}{\sqrt{50}}=563.997    

652.6+2.01\frac{311.7}{\sqrt{50}}=741.203    

So on this case the 95% confidence interval would be given by (563.997;741.203)    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=652.6 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=311.7 represent the sample standard deviation

n=50 represent the sample size  

Soltuion to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=50-1=49

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,49)".And we see that t_{\alpha/2}=2.01

Now we have everything in order to replace into formula (1):

652.6-2.01\frac{311.7}{\sqrt{50}}=563.997    

652.6+2.01\frac{311.7}{\sqrt{50}}=741.203    

So on this case the 95% confidence interval would be given by (563.997;741.203)    

6 0
3 years ago
Need help with this
maw [93]

Answer:

0, 5/4

Step-by-step explanation:

If k=0, you get 0=0, which is obviously true.

As long as K is not 0, you can divide by k and get 4k=5 which is solved by k=5/4

6 0
4 years ago
If the volume of the pyramid shown is 12 centimeters cubed, what is its height? A rectangular pyramid with a base of 3 centimete
MissTica

Answer:

C) 6cm

Step-by-step explanation:

Took test on e2020

8 0
3 years ago
Read 2 more answers
daniel wants to build a sandbox that has a perimeter of 20.5 feet. the length is 5.25 feet. what is the width of their sandbox?
Pavlova-9 [17]
If you subtract 20.5 by 5.25 x 2 you will get 10 by 2 and you have the answer
8 0
2 years ago
Read 2 more answers
Other questions:
  • Fond the domain of the function -4x/x+2
    5·1 answer
  • How do you simplify 4 to the second power
    8·2 answers
  • What is 0.46 cm converted into millimeters
    14·2 answers
  • 7k-2(3k+1)-9 simplifyed
    6·1 answer
  • Prove that
    5·1 answer
  • Rachel needs to save $1.015 to buy a new scooter. If she saves $35 each
    15·2 answers
  • 68 miles to 4 hours ratio in lowest terms
    10·2 answers
  • Please help I’m stressing
    7·1 answer
  • I need an answer please
    5·2 answers
  • (HELP ME ASAP PLEASE) In the following diagram, A || B.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!