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3 years ago

9

Please help i put the pictures down low, I really need it.

1 answer:

SVEN [57.7K]3 years ago

4 0

Part A
.. (480 books)/(5 cartons) = 480/5 books/carton = 96 books/carton

Part B
.. (7440 dollars)/(480 books) = 7440/480 dollars/book = $15.50 for 1 book

Part C
.. (2 minutes)/(48 books) * (200 books) = 400/48 minutes
.. = 8 minutes 20 seconds

Part D
In 9 minutes, the worker unpacked
.. (48 books)/(2 minutes)*(9 minutes) = 216 books
In 9 minutes, the manager upacked
.. (54 books)/(3 minutes)*(9 minutes) = 162 books

We note that 216 -162 = 54.

The worker unpacked 54 more books in 9 minutes than the manager did.

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Math Problem Solving<br>statistics and probability

luda_lava [24]

Answer:

Standard Deviation = 3.22

Variance = 10.36

Step-by-step explanation:

x P(x) x × P(x) x² x² × P(x)

19 0.20 3.8 361 72.2

10 0.20 2 100 20

11 0.30 3.3 121 36.3

12 0.20 2.4 144 28.8

13 0.10 1.3 169 16.9

____________________________________________

12.8 174.2 => Total

<em><u>Mean Formula</u></em>

$\mu_x = \sum(x \times P(x))$ $= 12.8$

$\mu_x^2 = 163.84$

<em><u>Variance Formula</u></em>

$\sigma _x^2 = \sum[x^2 \times P(x)] - \mu_x^2$

$= 174.2- 163.84\\\\=10.36$

<em><u>Standard Deviation Formula</u></em>

$Standard\ deviation, \ \sigma_x = \sqrt{Variance}$

$=\sqrt{10.36}\\\\=3.218$

5 0

3 years ago

For each gym membership sold, the gym keeps $42 and the employee who sold it gets $8. What is the commission the employee earned

horrorfan [7]

Answer:

Commission of the employee = 16%

Step-by-step explanation:

It is given that:

Amount kept by gym = $42

Amount given to employee = $8

Total fee = 42 + 8 = $50

Commission rate = $\frac{Commission}{Total\ fee}*100$

Commission rate = $\frac{8}{50}*100$

Commission rate = 0.16 * 100 = 16%

Therefore,

Commission of the employee = 16%

4 0

3 years ago

Read 2 more answers

Rusty is training for a triathlon. He

USPshnik [31]

Answer:

207 miles

Step-by-step explanation:

92/4

9•23

6 0

3 years ago

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).

kati45 [8]

Answer:

42.39 cubic feet

Step-by-step explanation:

7 0

3 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0

3 years ago