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GaryK [48]
3 years ago
6

Estimate the product of 38*249

Mathematics
2 answers:
AnnZ [28]3 years ago
5 0
The correct answer is 10,000
NemiM [27]3 years ago
3 0
I think its 9500, depends on how you are rounding it by the hundreds or the thousands
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Which of these is the same as 8/9 divided 2/3
swat32
Well, since you didn't attach the options. I will try to simplify the problem for you.⬇

Problem➡8/9 ÷2/3

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3 years ago
You're a quality control manager in a fruit juice company. You want to choose
alekssr [168]

Answer:

246.

Step-by-step explanation:

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

b) The minimum sample size to achieve this is 246.

Step-by-step explanation:

We have that to find our  level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so  

Now, find the margin of error M as such

In which  is the standard deviation of the population(square root of the variance) and n is the size of the sample. So in this question,  

The lower end of the interval is the sample mean subtracted by M. So it is 99 - 0.78 = 98.22

The upper end of the interval is the sample mean added to M. So it is 99 + 0.78 = 99.78.

a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78

(b) (5 points) If we want the sampling error to be no greater than 0.5, what is the minimum sample size to achieve this based on the same confidence level with part (a)

We need a sample size of n

n is found when  

Then

Rounding up

The minimum sample size to achieve this is 246.

7 0
3 years ago
Change the following expression into a single fraction: 3ab+2b^2/ab-a+2b/a+a-2b/b
ella [17]

Answer:

c-5

Step-by-step explanation:

3 0
2 years ago
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