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Mathematics

2 answers:

Lady_Fox [76]3 years ago

7 0

Answer:

Step-by-step explanation:

Breianliest?

Alinara [238K]3 years ago

4 0

D i think but i cant see it to good

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The circumference of a circle is 704 cm,find its area

Digiron [165]

The circumferince of the circle is 2πR ;
The area of the circle is π $R^{2}$ ;
Then, 2πR = 704 ;
R = 352 / π ;
π $R^{2}$ = π × ( 352 / π )^2 = ( 352^2) / π = 123904 / π ≈ 39459.87 ≈ 39460 cm^2 ;

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3 years ago

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What is the factored form of the expression? 4x^2-81y^2

Tasya [4]

$4x^2-81y^2$

$(2x)^2-(9y)^2
$

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The distribution of the test statistic for analysis of variance is the F-distribution. true or false

lubasha [3.4K]

Answer:

True. See explanation below

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

If we assume that we have $k$ groups and on each group from $j=1,\dots,k$ we have $k$ individuals on each group we can define the following formulas of variation: