All categories

4 years ago

Please help me or tell me the answer

Mathematics

2 answers:

-Dominant- [34]4 years ago

6 0

It's F. If you want me to explain or have any follow up questions feel free to ask.

zepelin [54]4 years ago

4 0

The answer is F 8 \ 100

You might be interested in

What’s the answer?? <br><br> B/18=-6

erastova [34]

Answer: -108/+18 = -6

Step-by-step explanation: Multiply 18 by -6 for B then it simplifies out.

3 0

3 years ago

Read 2 more answers

A car travels at an average speed of 48 miles per hour. How long does it take to travel 180 miles?

Luba_88 [7]

Answer:

3 hours and 45 minutes

Step-by-step explanation:

5 0

4 years ago

Question 8 is the one I’m having trouble on it

salantis [7]

Just multiply 30 times 2,000 and also multiply 30 times 700. The reason you will multiply it by 30 is because in 1 month there is 30 days. 30 x 2,000= 60000 30 x 700 = 21000 I’m only 9 btw so sorry if I didn’t give a lot of detail lol

4 0

3 years ago

The US Pentagon is a regular pentagon whose outer walls are each 921 feet in length. Find the area, to the nearest square foot,

ziro4ka [17]

$\bf \qquad \qquad \textit{area of a regular polygon}
\\\\\\
A=\cfrac{1}{4}\cdot n\cdot s^2\cdot cot\left( \frac{180}{n} \right)\quad 
\begin{cases}
n=
\begin{array}{llll}
\textit{number of sides in a polygon}\\
\textit{a pentagon, has PENTA=5 sides}
\end{array}\\
s=\textit{length of one of the sides}
\end{cases}$

7 0

3 years ago

A fast-food restaurant has an automated beverage machine that dispenses a set amount of liquid based on a size setting. Suppose

SashulF [63]

Answer:

$n=(\frac{2.58(17)}{10})^2 =19.24 \approx 20$

So the answer for this case would be n=20 rounded up to the nearest integer would be the sample required to obatin a margin of erros or 10 ml at 99% of confidence

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)

$\sigma =17$ represent the population standard deviation

n represent the sample size

Solution to the problem

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 =10 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)

The critical value for 99% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.005;0;1)", and we got $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(17)}{10})^2 =19.24 \approx 20$

So the answer for this case would be n=20 rounded up to the nearest integer would be the sample required to obatin a margin of erros or 10 ml at 99% of confidence

8 0

3 years ago