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RoseWind [281]
3 years ago
15

What is the answer this is a math question

Mathematics
1 answer:
Elena L [17]3 years ago
6 0

Answer:

1221 - 321 = 900

Step-by-step explanation:

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2 similar cardboards have areas of 24cm square and 150cm square. if the length of the bigger one is 10cm, what is the length of
kondaur [170]

Answer:

1,6

Step-by-step explanation:

150:10=15

24:15=1,6

8 0
3 years ago
Read 2 more answers
An ornithologist has 4 bird feeders at separate locations. She wonders if birds are equally likely to visit each of the feeders.
Marianna [84]

Answer:

the x² test statistic 13.71

Option a) 13.71 is the correct answer.

Step-by-step explanation:

Given the data in the question;

Feeder                     1      2      3       4

Observed visits; o_i  60   90   92    58

data sample = 300

Expected e_i = 300 / 4 = 75

the x² test statistic = ?

X^2_{stat = ∑[ (o_i - e_i)²/e_i]

X^2_{stat = [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]

X^2_{stat = [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]

X^2_{stat = 13.7066 ≈ 13.71

Therefore, the x² test statistic 13.71

Option a) 13.71 is the correct answer.

7 0
3 years ago
Plz help me with the answer
tester [92]
(-1,0) has the same x value as (-1,2)
6 0
3 years ago
A circle has center (5, -4) and radius 8. Which gives the equation of the circle?
miv72 [106K]

Answer:

A

Step-by-step explanation:

if not A then B but i'm pretty sure A

8 0
3 years ago
Х
ivolga24 [154]

Using permutations and the probability concept, it is found that there is a 0.0417 = 4.17% probability that Nia is chosen as president.

  • A probability is the <u>number of desired outcomes divided by the number of total outcomes</u>.
  • As there are different roles, the order in which the students are chosen is important, hence, the <em>permutation </em>formula is used to solve this question.

Permutation formula:

The number of possible permutations of x elements from a set of n elements is given by:

P_{(n,x)} = \frac{n!}{(n-x)!}

Desired outcomes:

  • Nia's president.
  • For the other roles, 3 students from a set of 23, hence:

D = P_{23,3} = \frac{23!}{20!} = 10626

Total outcomes:

4 students from a set of 24, hence:

T = P_{24,4} = \frac{24!}{20!} = 255024

Then:

p = \frac{D}{T} = \frac{10626}{255024} = 0.0417

0.0417 = 4.17% probability that Nia is chosen as president.

To learn more about probabilities, you can take a look at brainly.com/question/24437717

8 0
2 years ago
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