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3 years ago

Maths pi question. SEE ATTACHMENT

Mathematics

2 answers:

adelina 88 [10]3 years ago

8 0

Answer:

r = 6cm

Step-by-step explanation:

The area of a circle is given by

A = pi r^2 where r is the radius

36 pi = pi r^2

Divide each side by pi

36 pi/pi = pi r^2/ pi

36 = r^2

Take the square root of each side

sqrt(36) = sqrt(r^2)

6 =r

The radius is 6 cm

r = 6cm

Scilla [17]3 years ago

5 0

Answer:

radius, r = 6cm

Step-by-step explanation:

$Area = 36 \pi \\\\\pi r^2 = 36 \pi\\r^2 = 36\\r = \sqrt{36} = 6 \ cm$

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When obtaining a confidence interval for a population mean in the case of a finite population of size N and a sample size n whic

Elanso [62]

Answer:

95% Confidence interval for the mean

$142.8 \leq\mu\leq158.4$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the mean of a finite population.

The error is multiplied by the following finite population correction factor:

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The 95% confidence interval has a z value of 1.96, so it becomes:

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3 years ago

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3 0

3 years ago

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Oliga [24]

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2 years ago

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vichka [17]

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Step-by-step explanation:

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3 years ago

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SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

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3 years ago