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4 years ago

I need help on this one please

Mathematics

1 answer:

Ilya [14]4 years ago

3 0

I think the answer is 35.82 because if you see it is 3 then is adding 4 and it makes 7 and then you have to add 7 plus five is 12 so then the answer is 35.82

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What is the domain of the given function?

WINSTONCH [101]

Answer:(-2,6)

Step-by-step explanation: The domain is the x values of the two points

The points are (-2,-3) and (6,7)

7 0

3 years ago

The newborn baby, Jake, needs some supplies. Jake's mom gave you this list of things he needs. You and your friend have agreed t

Elan Coil [88]

Answer:

You have $23 left to spend on diapers for Jake.

Step-by-step explanation:

To be able to find the answer, first you need to calculate the amount you would spend on blanket:

$115*15%=$17.25

Now, you need to calculate the amount you would spend on toys:

$115*25%=$28.75

Then, you need to calculate the amount you would spend on clothes:

$115*40%=$46

Now, you need to add this values up and subtract the total from $115:

$17.25+$28.75+$46=$92

$115-$92=$23

According to this, the answer is that you have $23 left to spend on diapers for Jake.

3 0

4 years ago

Use the given information to find the minimum sample size required to estimate an unknown population mean mu. How many students

babymother [125]

Answer:

9413

Step-by-step explanation:

Given that :

Error = $2 ; Standard deviation (σ) =99 ; α = 95% = 0.95

Zα/2 = Z0. 05/2 = 1.96 (Z probability calculator)...

n = sample size

Recall:

n = ((Zα/2 * σ) / Error)^2

Using the formular above, the sample size n can be obtained ;

n = ((1.96 * 99) / 2)^2

n = 97.02^2

n = 9412.8804

n = 9413

5 0

3 years ago

Evaluate 9P4<br> A. 9<br> B. 362,880<br> C. 126<br> D. 3024

laiz [17]

Answer:

3024

Step-by-step explanation:

3024

4 0

3 years ago

Sample annual salaries (in thousands of dollars) for employees at a company are listed. (a) Find the sample mean and sample s

Helen [10]

Answer:

Follows are the solution to the given points:

Step-by-step explanation:

The value is attached in the image file please find it.

In point a:

First, we calculate the find the mean,

Formula:

$\to Mean (\bar{x}) = \frac{( \sum x)}{n}$

$=\frac{540}{13}\\\\ = 41.54$

To calculate the standard deviation, subtract the mean value from all observations then square its value:

$SD = \sqrt{\frac{\sum(x-\bar{x})^2}{n-1}} \\$ $= \sqrt{ \frac{339.2308}{13-1}}$

$= \sqrt{ \frac{339.2308}{12}}\\\\= \sqrt{28.269}\\\\=5.31$

please find attached file

In point b:

New $x_i = 1 x_i + 0.05 x_i = 1.05 x_i$

Calculate new mean:

$\to \bar{x} = \frac{\sum x}{n} \\$

$=\frac{567}{13} \\\\= 43.62$

calculating the standard deviation:

$SD = \sqrt{\frac{\sum(x-\bar{x})^2}{n-1}} \\$ $= \sqrt{ \frac{374.0022}{13-1}}$

$= \sqrt{ \frac{374.0022}{12}}\\\\= \sqrt{31.16}\\\\=5.58$

please find attached file

In point C:

Calculate new mean:

$\to \bar{x} = \frac{\sum x}{n} \\$

$=\frac{47.25}{13} \\\\= 3.46$

calculating the standard deviation:

$SD = \sqrt{\frac{\sum(x-\bar{x})^2}{n-1}} \\$ $= \sqrt{ \frac{2.5975}{13-1}}$

$= \sqrt{ \frac{2.5975}{12}}\\\\= \sqrt{0.216}\\\\=0.46$

please find attached file

In point d:

for b,

New $\bar{x}= 1.05 \bar{x}= 1.05(41.54) =43.62$

New $s= 1.05s= 1.05(5.31)=5.57$

for c,

New $\bar{x}= \frac{ \bar{x}}{12}= \frac{41.54}{12} = 3.46$

New $s = \frac{s}{ 12} = \frac{5.31}{12}= 0.44$

4 0

4 years ago