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VLD [36.1K]
3 years ago
8

What is the volume of the cube?

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
3 0
The volume of a cube is the length of a single side cubed: <span>V=<span>s3</span></span> In this case: <span>V=<span>83</span></span><span>V=512</span><span> So D.
hope this helps</span>
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there are 60 kids who plays soccer 5% of the kids also play chess how many children play both soccer in chess​
Mice21 [21]

Answer:

10% (I think)

Step-by-step explanation:

I am not 100% sure that this is correct cause I'm not that good at math if I am hope it helps!

8 0
3 years ago
Bianca puts $10 in a savings account each month and an extra $20 when she receives money for her birthda If her birthday was thi
german
The expression should look something like 10x+20. 
8 0
3 years ago
What is the answer to this equation 5X + 4 = 49
Mrrafil [7]
Okay -

So, the goal when we have an equation is to find the value of the variable. So, let's isolate that variable on <em>one </em>side of the equation!

<em>* original equation </em>
<em>5x + 4 = 49.

</em><em>* subtract four from both sides. if you do something on one side of the equation, you have to do it on the other.
</em><em>5x + 4 - 4 = 49 - 4.

* now we are going to divide 5 on both sides to isolate x.
5x/5 = 45/5.

* and our answer is...
x = 9. =)

</em>
3 0
3 years ago
Read 2 more answers
The mean waiting time at the drive-through of a fast-food restaurant from the time the food is ordered to when it is received is
alexira [117]

Answer:

a) And if we replace we got: \bar X= 78

s = 15.391

b) 78-3.25\frac{15.391}{\sqrt{10}}=62.182    

78-3.25\frac{15.391}{\sqrt{10}}=93.818    

So on this case the 99% confidence interval would be given by (62.182;93.818)    

Step-by-step explanation:

Dataset given: 109 67 58 76 65 80 96 86 71 72

Part a

For this case we can calculate the sample mean with the following formula:

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

And if we replace we got: \bar X= 78

And the deviation is given by:

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

And if we replace we got s = 15.391

Part b

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=10-1=9

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,9)".And we see that t_{\alpha/2}=3.25

Now we have everything in order to replace into formula (1):

78-3.25\frac{15.391}{\sqrt{10}}=62.182    

78-3.25\frac{15.391}{\sqrt{10}}=93.818    

So on this case the 99% confidence interval would be given by (62.182;93.818)    

8 0
3 years ago
Simplify the expression. 2n/3n​
balandron [24]

\dfrac{2n}{3n}=\dfrac{2\cdot \not n}{3\cdot\not n}=\dfrac{2}{3}

3 0
3 years ago
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