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navik [9.2K]
3 years ago
13

Diameter is 22.5m. Calculate the area (round your answer to 2 decimal places), Use 3.14 for Pi​

Mathematics
1 answer:
alexgriva [62]3 years ago
4 0

Answer:

397.61m

Step-by-step explanation:

A = 1

4πd^2 = 1

4 x π x 22.52 = 397.60782

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What is the domain and range of the relation shown in the table?
seropon [69]

Answer:

domain: {2, -1, 5, -3}

range: {2, 4, 2, 0}

Step-by-step explanation:

domain : of all the input values shown on the x-axis.

range : the set of possible output values shown on the y-axis.

7 0
3 years ago
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:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2  

And we have this property  

SST=SS_{between}+SS_{within}  

The degrees of freedom for the numerator on this case is given by df_{num}=k-1 where k represent the number of groups.  

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-k.  

And the total degrees of freedom would be df=N-1

And the we can find the F statistic F=\frac{MSR}{MSE}

8 0
3 years ago
Find the slope of the line through the given points.<br> (-3,-18) and (1,2)
katovenus [111]

Answer:

5

Step-by-step explanation:

Slope (m) =

ΔY

ΔX

=

5

1

= 5

θ =

arctan( ΔY )

ΔX

= 78.69006752598°

ΔX = 1 – -3 = 4

ΔY = 2 – -18 = 20

Distance (d) = √ΔX2 + ΔY2 = √416 = 20.396078054371

Equation of the line:

y = 5x – 3

When x=0, y = -3

When y=0, x = 0.6

7 0
3 years ago
Mr. Peter's has 80 sheets of colored paper seven of his students need it for a project. how many sheets are left over?
mars1129 [50]
73 sheets are left over
8 0
3 years ago
Read 2 more answers
A skydiver parachutes to the ground. The height y (in feet) of the skydiver after x seconds is y=-10x+3000. If the skydiver land
makkiz [27]

put y=0 & find x. call it x1.

put x=0 & find y. call it y1.

define the points (x1, 0) & (0, y1) on a cartesian plane. connect the points with a line to find the interception.

6 0
4 years ago
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