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3 years ago

The height of a cone-shaped statue is 9 ft, and the diameter is 4 ft.

1 answer:

5 0

37.7
The formula is V=πr^2*h/3, and since r is 4/2, you multiply it by π and then multiply it h/3, which is 9/3, so ((2*3.14)*3)= 37.7.

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Match each item CORRECTLY :

Tanzania [10]

1 goes to touch

2 sight and touch

3 is hearing

4 sight and hearing

5 is sight

5 0

2 years ago

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A 90% confidence interval for the mean height of students

Westkost [7]

Answer:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean $\mu$ is given by this formula:

$\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}$

The confidence level on this case is 0.9 and the significance $\alpha=1-0.9=0.1$

The confidence interval calculated on this case is $60.128 \leq \mu \leq 69.397$

The margin of error for this confidence interval is given by:

$ME =t_{\alpha/2} \frac{s}{\sqrt{n}}$

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

$ME = \frac{Upper -Lower}{2}$

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

4 0

3 years ago

Tyrone has 8/9 of a foot of string. He needs to cut pieces of string that are 1/4 of a foot long. How many whole 1/4 foot pieces

Gekata [30.6K]

9514 1404 393

Answer:

Step-by-step explanation:

You can use your number sense to realize that 8/9 is between 3/4 and 1, so Tyrone can only get 3 whole pieces from his string.

If you like, you can do the division ...

(8/9)/(1/4) = (8/9)(4/1) = 32/9 = 3 5/9 . . . . . 3 whole pieces

Or, you can compare decimal values.

1 piece = 0.25 ft

2 pieces = 0.50 ft

3 pieces = 0.75 ft

4 pieces = 1.00 ft

String length = 0.888.... ft (more than 3; less than 4 pieces)

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2 years ago

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2 years ago

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Dovator [93]

The equation of the elipse is given by:

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