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DiKsa [7]
3 years ago
9

A CD is shaped like a circle with a diameter of 12 cm. To the nearest centimeter, what is the circumference of the CD?

Mathematics
2 answers:
emmainna [20.7K]3 years ago
4 0

Answer:

38 cm

Step-by-step explanation:

Circumference is given by

C = pi *d

C = pi *12

C = 3.14 * 12

C=37.68

Rounding to the nearest cm

C = 38

natima [27]3 years ago
4 0

Answer:

38 cm

Step-by-step explanation:

The circumference is found by pi*diameter.

pi*12=37.6991118431, rounded up is 38

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Step-by-step explanation:

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Step-by-step explanation:

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A sample of 5 strings of thread is randomly selected and the following thicknesses are measured in millimeters. Give a point est
liq [111]

Answer:

s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132

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s= \sqrt{0.00132}=0.0363

And that value represent the best estimator for the population deviation since:

E(s) =\sigma

Step-by-step explanation:

For this case we have the following data:

1.48,1.45,1.54,1.52,1.52

The first step for this cae is find the sample mean with the following formula:

\bar X =\frac{\sum_{i=1}^n X_}{n}

And replacing we got:

\bar X= \frac{1.48+1.45+1.54+1.52+1.52}{5} = 1.502

And now we can calculate the sample variance with the following formula:

s^2 =\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}

And replacing we got:

s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132

And for the deviation we have:

s= \sqrt{0.00132}=0.0363

And that value represent the best estimator for the population deviation since:

E(s) =\sigma

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Answer:

<h2>-5</h2><h2>-6, -7, -8, -9, etc.</h2>

Step-by-step explanation:

<h2>Hopes this helps. Mark as brainlest plz!</h2>
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Answer:

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Step-by-step explanation:

We are given the line y=2x+8. It is in slope-intercept form or y= mx+b, where m is the slope and b is the y-intercept.

The slope of the line is 2.

We want to find the equation that is perpendicular. Perpendicular lines have negative reciprocal slopes.

1. Negate

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2. Reciprocal

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The perpendicular slope is -1/2, so the correct equation must be B.

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