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Alex777 [14]
3 years ago
14

A triangle has two sides lengths with 5 cm and 8cm which could be true

Mathematics
1 answer:
devlian [24]3 years ago
4 0

Answer:

A

Step-by-step explanation:

It has 80cm volume

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In the following table, elevation is the input and amount of snowfall is the output.
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B. Yes, each amount of snowfall is paired with one elevation.
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Can someone help me with this, I don’t understand.
Tema [17]
180-(83+53)=44
That will be the answer
3 0
3 years ago
Which of the following statements are true about the figure above?<br> Check all that apply.
mars1129 [50]

Answer:

a and c

Step-by-step explanation:

because its a 3rd demenshion sphere

3 0
2 years ago
A random sample of the costs of repair jobs at a large muffler repair shop produces a mean of $127.95. and a standard deviation
lubasha [3.4K]

Answer:

127.95-1.685\frac{24.03}{\sqrt{40}}=121.55    

127.95 +1.685\frac{24.03}{\sqrt{40}}=134.35    

So on this case the 90% confidence interval would be given by (121.55;134.35)    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=127.95 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=24.03 represent the sample standard deviation

n represent the sample size  

Solution to the problem

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=40-1=39

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,39)".And we see that t_{\alpha/2}=1.685

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

127.95-1.685\frac{24.03}{\sqrt{40}}=121.55    

127.95 +1.685\frac{24.03}{\sqrt{40}}=134.35    

So on this case the 90% confidence interval would be given by (121.55;134.35)    

8 0
2 years ago
Charles earned a total of $180 from working 12 hours. He earned the same amount each hour. Write an equation to describe the rel
olga2289 [7]

Answer:

he earns $15 an hour. the equation is 12h=t

Step-by-step explanation:

you can make the equation 180=12x where x equals the amount per hour

divide 12 by both sides and you get x=15 which means he makes 15 dollars an hour

7 0
3 years ago
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