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4 years ago

How do you do long division for thousands

1 answer:

7 0

Answer: For example if it is a number such as 45,212 and you are dividing it by 20. Ignore the 212 until you get rid of the 45 then go from there.

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According to a research center, 16% of all merchandise sold in a particular country gets returned. A department store in a certa

Mamont248 [21]

Answer:

a) point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

Point estimate = 0.3

b) The 95% confidence interval for the proportion of returns at the store in the given city

( 0.19958,0.40042)

Step-by-step explanation:

Given the Population proportion 'P'= 16% = 0.16

Given data a department store in a certain city sampled 80 items sold in January and found that 24 of the items were returned

The sample proportion $p = \frac{x}{n}$

here x =24 and n = 80

The sample proportion $p = \frac{x}{n} = \frac{24}{80} = 0.3$

a) Point estimate:-

A point estimate of the true proportion P

Point estimate = $p = \frac{x}{n}$

point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

$p = \frac{x}{n} = \frac{24}{80} = 0.3$

b) The 95% confidence interval for the proportion

The 95% confidence interval for the proportion of returns at the store in the given city

$(p - z_{\alpha } \sqrt{\frac{p(1-p)}{n} } , p + z_{\alpha }\sqrt{\frac{p(1-p)}{n} } )$

substitute all values we get ,

$(0.3 - 1.96 \sqrt{\frac{0.3(1-0.3)}{80} } , 0.3 + 1.96\sqrt{\frac{0.3(1-0.3)}{80} } )$

on simplification, we get

(0.3-0.10042 ,0.3+0.10042)

( 0.19958,0.40042)

Conclusion:-

a) point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

Point estimate = 0.3

b) The 95% confidence interval for the proportion of returns at the store in the given city

( 0.19958,0.40042)

5 0

4 years ago

Solve each given equation and show your work. Tell wether it has one solution, an infinite number of solutions, or no solutions,

3241004551 [841]

Answer:

See below in bold.

Step-by-step explanation:

(A) 20 -4x=12 -x+8-3x

-4x + x + 3x = 12 + 8 - 20

0 = 0 This is an Identity.

Infinite solutions.

B). 5x+4x-3=24+8x

9x - 8x = 24 + 3

x = 27. One solution.

C. 5x+6=2x+6+3x-15

5x - 2x - 3x = -15 + 6 - 6

0 = -15

No solution.

3 0

4 years ago

How many lines of symmetry does the figure below appear to have

LuckyWell [14K]

I see no figure in your question

5 0

3 years ago

Plz help I dont know

Luba_88 [7]

6 units up and 3 to the right! hope i help

6 0

3 years ago

Malaya is making a collage of her birthday party photos and she wants to add an 8 x 10 inch. photo. Since there is not enough sp

sergij07 [2.7K]

Answer:

The answer is C. 6.4 X 8 in

Step-by-step explanation:

If the scale factor from the original to the trimmed photo is 5:4

The statement above just means the scale of the old dimension is 5 while the scale of the new dimension is 4.

To get the new dimensions, multiply each of the old dimensions by 4/5

4/5 X 10 = 8

4/5 X 8 = 6.4

Therefore the new dimension is 6.4 X 8 in

3 0

4 years ago