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3 years ago

Help me with this algebra nation problem

Mathematics

1 answer:

Sergio [31]3 years ago

6 0

Answer:

$295,245

Step-by-step explanation:

Each year the value is 0.9 times what it was the year before. After 5 years, the value is ...

$500,000 × 0.9^5 = $295,245

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Deffense [45]

Yes the graph does represent a function

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3 years ago

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There are a total of 62 students in the robotics club and the science club. The science club has 8 fewer students than the robot

Lesechka [4]

To find this answer you simply subtract eight from sixty-two, which gives you....
54!

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Hope this helps! :)

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3 years ago

A board measures 4 yards, 2 feet, and 6 inches. What is its length in feet?

never [62]

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3 years ago

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Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbar

Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : $n=45$

$\overline{x}=148.79\text{ lb}$

$\sigma=31.37\text{ lb}$

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = $\mu=148.79\text{ lb}$

b) The confidence interval for the population mean is given by :-

$\mu\ \pm E$ , where E is the margin of error.

Formula for Margin of error :-

$z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Margin of error : $E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69$

Now, the 90% confidence interval for the population mean will be :-

$148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)$

Hence, the 90% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

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3 years ago

The liter is the basic unit of weight in the metirc system?

Ivanshal [37]

False. The liter is the basic unit of volume in the metric system. The basic unit of weight is the kilogram.

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4 years ago