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2 years ago

Can someone please help me.

Mathematics

2 answers:

emmasim [6.3K]2 years ago

6 0

Answer:

volume= 1/3πr²h

932.58=1/3×3.14×r²×11

3×932.58=34.54×r² ×3

2,797.74 = 34.54×r²

34.54. 34.54

√r²= √81

r=9mm

Anika [276]2 years ago

5 0

Answer:

Radius= 8.99 mm (9 mm)

Step-by-step explanation:

We use the formula for the volume of a cone which is

1/3 pi ×(radius)^2 *height

932.58 = (pi) × (11) ×(r^2/3)

Radius^2 = (932.58×3) / (11pi)

= 80.96m

Radius= 8.99mm

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Step-by-step explanation:

Assuming the following dataset:

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And we want a linear model on this way y=mx+b, where m represent the slope and b the intercept. In order to find the slope we have this formula:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

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And the slope would be:

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Nowe we can find the means for x and y like this:

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$b=\bar y -m \bar x=24.25-(-6.254*8.125)=75.064$

So the line would be given by:

$y=-6.254 x +75.064$

Part b

For this case we need to calculate the correlation coefficient given by:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

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