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nataly862011 [7]
2 years ago
13

A printer can print 27 pages in 4.5 min. How much time does it need to print 324 pages?

Mathematics
1 answer:
Llana [10]2 years ago
5 0
Divide 324 by 27
324/27=12

Multiply 12 by 4.5
12*4.5=54

It needs 54 minutes to print 324 pages
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see below

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A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba
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Answer:

z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68  

Step-by-step explanation:

Information provided

n=100 represent the random sample taken

X=21 represent the number of bags overfilled

\hat p=\frac{21}{100}=0.21 estimated proportion of overfilled bags

p_o=0.15 is the value that we want to test

z would represent the statistic

Hypothesis

We need to conduct a hypothesis in order to test if the true proportion of overfilled bags is higher than 0.15.:  

Null hypothesis:p =0.7  

Alternative hypothesis:p > 0.15  

The statistic for this case is:

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And replacing the info given we got:

z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68  

5 0
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Which expression has the same value as -18÷(-9)
erma4kov [3.2K]
Negative dividing by negative gives positive,
so 18:9=2
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