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devlian [24]
2 years ago
6

Pls help

Mathematics
2 answers:
kupik [55]2 years ago
7 0

Answer:

0.54kilometres

Step-by-step explanation:

a)actual distance =2.7*20000

                           =54000cm

                            =0.54kilometres

andrew11 [14]2 years ago
6 0

Answer:

hello an i dont like the person who keeps deleting my answers

Step-by-step explanation:

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Evaluate the expression: 231 - g for g = 17 .
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kuyky

Step-by-step explanation:

kmjkfhjmk

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3 years ago
Write 9.9.9.9<br> 9.9.9 using exponential notation
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9x9x9x9x9x9x9 = 9^7

Hope you’re having a positive day
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Given the function ƒ(x) = 3x + 5, find ƒ(4) and x such that ƒ(x) = 38.
MissTica

Answer: A.17;11

f(4)= 3(4) + 5

=12 + 5

=17

And, f(x)= 38

=>3x+5=38

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5 0
3 years ago
A realtor would like to create a 95% confidence interval for the average price of a house in Franklin County, Ohio. To accomplis
VMariaS [17]

Answer:

320128-1.96\frac{50324}{\sqrt{529}}=315839.52    

320128+1.96\frac{50324}{\sqrt{529}}=324416.48    

So on this case the 95% confidence interval would be given by (315839.52;324416.48)    

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=320128 represent the sample mean

\mu population mean (variable of interest)

\sigma=50324 represent the population standard deviation

n=529 represent the sample size  

Solution to the problem

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that z_{\alpha/2}=1.96

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

320128-1.96\frac{50324}{\sqrt{529}}=315839.52    

320128+1.96\frac{50324}{\sqrt{529}}=324416.48    

So on this case the 95% confidence interval would be given by (315839.52;324416.48)    

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Identify the property shown <br> (3x5)x10=3x(5x10)
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Asociative property of multiplication
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