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adell [148]
3 years ago
5

What is a reasonable estimate for 8.24 divided by 4? Explain

Mathematics
1 answer:
sashaice [31]3 years ago
6 0
A reasonable estimate for 8.24 divided by 4 would be 2. This would be a reasonable estimate because .24 rlly isn’t all that much so you are able to round down to 8. (Hope that’s right!)
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Factoriza la diferencia de cubos
makvit [3.9K]

Answer:

The first one will be equal 2

Because

\frac{ - 64}{8}   =  - 8

x ^{3}  = 8 \\

\sqrt[3]{ - 8}  =  - 2

Oh sorry i read the question wrongly i thought you wanted the value of x

8 0
3 years ago
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A professor at a university wants to estimate the average number of hours of sleep students get during exam week. The professor
kotegsom [21]

Answer:

n=(\frac{1.64(6.995)}{1.939})^2 =35.003 \approx 36

So the answer for this case would be n=36 rounded up to the nearest integer

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 represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma =6.995 represent the population standard deviation

n represent the sample size  

Solution to the problem

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: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =1.939 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

If we replace we have this:

n=(\frac{1.64(6.995)}{1.939})^2 =35.003 \approx 36

So the answer for this case would be n=36 rounded up to the nearest integer

4 0
3 years ago
Candace received a 14% raise as part of a promotion with her work. Before the promotion she was earning $22.50 an hour. What is
Norma-Jean [14]
Answer: $25.65

explanation: 14% of $22.50 is 3.15

22.50 + 3.15 = $25.65

hope this helps :)
8 0
3 years ago
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Gary’s Doughnuts sells a dozen doughnuts for $4.08. What is the unit cost per doughnut?
strojnjashka [21]

Answer:

0.34 is the unit cost.

Step-by-step explanation:

I will be waiting for brainliest...

3 0
3 years ago
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100 POINTS! PLEASE HELP!
Semmy [17]

Apply angle bisector theorem

\\ \sf\longmapsto \dfrac{9}{15}=\dfrac{3}{5}=\dfrac{2x-1}{3x}

\\ \sf\longmapsto 9x=5(2x-1)

\\ \sf\longmapsto 9x=10x-5

\\ \sf\longmapsto 10x-9x=5

\\ \sf\longmapsto x=5

#2

\\ \sf\longmapsto \dfrac{4}{3}=\dfrac{x}{2.25}

\\ \sf\longmapsto 4(2.25)=3x

\\ \sf\longmapsto 3x=9

\\ \sf\longmapsto x=3

Hope it helps

4 0
2 years ago
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