3 years ago

Which is likely to have a mass close to 3 kilograms?

1 answer:

6 0

3 kilograms is about 6.61 pounds.

Therefore, B. a bowling ball is most likely out of your options to have a mass close to 3 kilograms.

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elena55 [62]

Answer:

The right answer is : f(-4)=5

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3 years ago

The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

VLD [36.1K]

Answer:

$3.13$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

$\chi^2_{1-\frac{\alpha}{2}}= 51.770$

Chi square critical value for upper tail =

$\chi^2_{\frac{\alpha}{2}}= 81.085$

80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

Putting values, we get,

$=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13$

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

8 0

3 years ago

A rectangle has a length this is three times its width. If the area of the rectangle is 27 square feet, what are the dimensions

yuradex [85]

Answer:

The width of the rectangle is 3 and the width is 9. Those are reasonable measurements.

Step-by-step explanation:

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3 years ago

viet learned 25 new spelling words last week. He learned 5 times as many words as Max. How many words did Max learn? Draw a lbar

masya89 [10]

Max learned 125 new spelling words i know this becuse 25 times 5 is 125

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3 years ago

Find the perimeter of a square that is 3 3\4 inches on a side.

goldfiish [28.3K]

It is B!!! If you take 3 3/4 times the # of sides which in this case is 4 equals 15 in the end.

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3 years ago