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3 years ago

9

The radious of the circle is 9 meters what is the curcles cercumference

1 answer:

miskamm [114]3 years ago

5 0

The circumstance of the circle would be 56.55

C= 2πr
C=(2)(π)(8)
= 56.5486677646 round up and it would be 56.55

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cupoosta [38]

Y = 925/z

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3 years ago

Write the quadratic function f(x) = x2 + 8x + 3 in vertex form.

Stolb23 [73]

F(x)=(x+4)2−13 i think this is the simplified of the perfect trinomial

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3 years ago

Three vertices of a rectangle are (–2, 1), (–2, –3), and (4, –3)

Tpy6a [65]

The answer is C
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3 years ago

What is unique about a number that a perfect square

Alexandra [31]

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7 0

3 years ago

Among 420 randomly selected employees at a company, the mean number of hours of overtime worked per month is 10 hours and the st

kari74 [83]

The margin of error of the random selection is 0.20

The given parameters are:

$n = 420$ --- the sample size

$\sigma = 1.6$ --- the standard deviation

$\bar x = 10$ --- the mean

$\alpha = 99\%$ --- the confidence level.

The margin of error (E) is calculated as follows:

$E = z \times \sqrt{\frac{\sigma^2}{n}}$

So, we have:

$E = z \times \sqrt{\frac{1.6^2}{420}}$

$E = z \times \sqrt{\frac{2.56}{420}}$

The z-value for 99% confidence level is 2.576.

Substitute 2.576 for z

$E = 2.576 \times \sqrt{\frac{2.56}{420}}$

$E = 2.576 \times \sqrt{0.006095}$

Take square roots

$E = 2.576 \times 0.0781$

Multiply

$E = 0.2012$

Approximate

$E = 0.20$

Hence, the margin of error is 0.20

Read more about margin of error at:

brainly.com/question/14396648

8 0

2 years ago

Read 2 more answers