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navik [9.2K]
2 years ago
13

If you have d=10 what is the area​

Mathematics
1 answer:
anastassius [24]2 years ago
5 0
78.5 feet that’s should be right
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Social media is popular around the world. Statista provides estimate of the number of social media users in various countries in
amm1812

Answer:

Kindly check explanation

Step-by-step explanation:

The data table :

Use of SM _UK _China _ Russia _US _ col total

Yes ______480 __215 ___343 __640 _ 1678

No _______320 _ 285 ___357__ 360 _ 1322

Row Total__ 800 _500 __ 700_ 1000_ 3000

H0 : p1 = p2 = p3 = p4

H1 : p1 ≠ p2 ≠ p3 ≠ p4

Test statistic :

χ² = Σ(observed - Expected)² / Expected

Expected value of each cell = (Row total * column total) / N

N = grand total

Expected Values:

447.467 _279.667 _ 391.533 _ 559.333

352.533 _ 220.333 _ 308.467 _ 440.667

χ²=(2.36536+14.9527+6.01605+11.6337+3.00232 18.9793+7.63611+14.7665) = 79.352

Degree of freedom, df = (row-1)*(column-1) = (2 - 1) * (4 - 1) = 1 * 3 = 3

Using the Pvalue from Chisquare calculator :

Pvalue(79.352, 3) = 0.00000000001

Decision region :

Reject H0 ; If Pvalue < α

α = 0.05

Since 0.000000001 < 0.05 ; Reject H0 and conclude that not all population proportion are equal.

Sample proportion :

Phat = number of yes, x / total

For UK, Phat = 480/800 = 0.6

For China , Phat = 215/500 = 0.43

For Russia , Phat = 343/700 = 0.49

For US, Phat = 640/1000 = 0.64

7 0
3 years ago
The quantity of soap produced in 2009 is 3000bars. if this is a 20% increase of what was produced in 2008.what is the quantity o
mr Goodwill [35]
2,400
20% of 3,000= 600
3,000 - 600= 2,400
6 0
3 years ago
What is have of the number 21?
Colt1911 [192]

Answer:

21

Step-by-step explanation:

you now aswer to that question yes or no

7 0
3 years ago
Solve. -2 1/4 ÷ (-1 1/2)
Pie

Answer:

=21/22

(Decimal: 0.954545)

hope i helped -lvr

5 0
3 years ago
Pls help will mark brainlist if correct !! :))
german

Answer:

its (B)

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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