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ValentinkaMS [17]
3 years ago
15

A single, standard number cube is tossed. What is the probability of getting a 4 or a 5?

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
5 0

Answer:

c) 1/3

Step-by-step explanation:

since there are 6 sides to the dice and 2 options could be chosen= 2/6 and that simplified is 1/3

Debora [2.8K]3 years ago
4 0

Answer:

C

Step-by-step explanation:

The probability of rolling a 4 or 5 out of six numbers is 2/6. That is simplified to be 1/3. Hope this helps!

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dimulka [17.4K]
Answer: no, the confidence interval for the standard deviation σ cannot be expressed as 15.7 \pm 4.7

There are three ways in which you can possibly express a confidence interval:

1) inequality
The two extremities of the interval will be each on one side of the "less then" symbol (the smallest on the left, the biggest on the right) and the symbol for the standard deviation (σ) will be in the middle:
11.0 < σ < 20.4
This is the first interval given in the question and it means <span>that the standard deviation can vary between 11.0 and 20.4

2) interval
</span>The two extremities will be inside a couple of round parenthesis, separated by a comma, always <span>the smallest on the left and the biggest on the right:
(11.0, 20.4)
This is the second interval given in the question.

3) point estimate </span><span>\pm margin of error</span>
This is the most common way to write a confidence interval because it shows straightforwardly some important information. 
However, this way can be used only for the confidence interval of the mean or of the popuation, not for he confidence interval of the variance or of the standard deviation.

This is due to the fact that in order to calculate the confidence interval of the standard variation (and similarly of the variance), you need to apply the formula:
\sqrt{ \frac{(n-1) s^{2} }{\chi^{2}_{\alpha / 2} } } \leq \sigma \leq \sqrt{ \frac{(n-1) s^{2} }{\chi^{2}_{1 - \alpha / 2} } }

which involves a χ² distribution, which is not a symmetric function. For this reason, the confidence interval we obtain is not symmetric around the point estimate and the third option cannot be used to express it.
4 0
3 years ago
Solve for b: A= (h(a+b))/2
tresset_1 [31]

A= (h(a+b))/2

multiply each side by 2

2A =  (h(a+b))

divide each side by h

2A/h = a+b

subtract a from each side

2A/h -a = b

6 0
3 years ago
-7(1-10)<br><br> Giving brainlist out again
belka [17]

Answer:

Step-by-step explanation:

-7(1-10)

10-1=9

9 – -7=2

8 0
2 years ago
How would you set up this problem to find the height of the sail using reciprocal functions?
AVprozaik [17]

Remark

I'm not sure I know what you mean, but I will answer trying to interpret it so it fits the description of the question.

Step One: Set up the equation. The normal way of solving this would be to use the Cos function.

Cos(theta) = Adjacent / hypotenuse = x/8 Multiply both sides by 8

8*cos(theta) = x Theta = 35

8*cos(35) = x This is about as simple a way as is possible.

6.553 = the height of the sale.

Step Three: try using the reciprocal

1 / cos(35)= hypotenuse / adjacent

1/0.8191 = 8/x cross multiply

x = 0.8191 * 8

x = 6.553

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3 years ago
List 3 value that would make 24
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Here are your answers you are looking for.

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