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3 years ago

Can someone please help me

Mathematics

1 answer:

devlian [24]3 years ago

7 0

I believe it's the same as adding 8+3, but you add the negative sign to your answer
so 8+3 = (-?)

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Write the number as a question of integers to show that it is rational.<br> Please reply quickly!

snow_lady [41]

Answer:

$\frac{-37}{99}$

Step-by-step explanation:

0.555555... becomes $\frac{5}{9}$

Using this logic, we can do the following:

$-0.37373737... = \frac{-37}{99}$

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

3 0

3 years ago

Two sisters, sister A and sister B, play SCRABBLE with each other every evening. Sister A is a statistician, and she draws a ran

snow_tiger [21]

Answer:

First question: LCL = 522, UCL = 1000.5

Second question: A sample size no smaller than 418 is needed.

Step-by-step explanation:

First question:

Lower bound:

0.36 of 1450. So

0.36*1450 = 522

Upper bound:

0.69 of 1450. So

0.69*1450 = 1000.5

LCL = 522, UCL = 1000.5

Second question:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

The project manager believes that p will turn out to be approximately 0.11.

This means that $\pi = 0.11$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The project manager wants to estimate the proportion to within 0.03

This means that the sample size needed is given by n, and n is found when M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.11*0.89}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.11*0.89}$

$\sqrt{n} = \frac{1.96\sqrt{0.11*0.89}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.11*0.89}}{0.03})^2$

$n = 417.9$

Rounding up

A sample size no smaller than 418 is needed.

6 0

3 years ago

Arianna is packing scented candles and candle holders into gift boxes. She has 84 candles and 48 holders, and each box must cont

Sholpan [36]

The answer is A

Hope this helps!

3 0

3 years ago

The Chewy Candy Company is test marketing a new candy bar in Seoul and Manila.

Anon25 [30]

The first month in which the board will see the cumulative total number of candy bars sold in Manila exceeded the cumulative total in Seoul is of:

3rd month.

<h3>What are linear functions?</h3>

The slope-intercept definition of a linear function is presented as follows:

y = mx + b.

In which the coefficients are defined as follows:

m is the slope, representing the rate of change.

b is the y-intercept, representing the initial value.

For the functions in this problem, the slope and the intercept are given as follows:

Slope: Monthly increase.

Intercept: amount sold by the end of the first month.

Taking the end of the first month as a parameter, the functions are defined as follows:

Seoul: S(m) = 40 + 60(m - 1).

Manila: M(m) = 20 + 80(m - 1).

Then Manila exceeds Seoul when:

M(m) > S(m)

20 + 80m - 80 > 40 + 60m - 60

20m > 40

m > 2.

2.1 for example is in the 3rd month, hence the 3rd month is the correct answer.

More can be learned about linear functions at brainly.com/question/24808124

#SPJ1

3 0

1 year ago

Help Immediately! 98 points!!!!!!!

joja [24]

the answer is a add -19w and dont forget to do it on each side

4 0

3 years ago

Read 2 more answers