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bazaltina [42]
3 years ago
10

Which expression is equivalent to r^m ÷ r^n r^m − n r^m + n r^m ⋅ n r^m ÷ n

Mathematics
2 answers:
REY [17]3 years ago
4 0
Hey there!

The answer should be r^m + n 
Neporo4naja [7]3 years ago
4 0
<span>r^m ÷ r^n
= r^(m - n)

Answer
</span>r^(m - n)
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There are 5 girls and 5 boys in a chess club. The club holds a round-robin tournament in which every player plays against every
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There are 81 athletes who joined a parade. Four-ninths of them are basketball players. How many basketball players joined the pa
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Answer:

36

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5 0
2 years ago
Of 585 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared
Dafna1 [17]

Answer:

a) The 99% confidence interval is from 14.8% to 23.2%.

b) The confidence interval tells us that the true proportion of mislabeled is within 14.8% and 23.2%, with a 99% confidence. In other words, if we take samples of the same size, 99% of the samples will have a proportion within 0.148 and 0.232.

c) The confidence interval calculation take into account the sample size, so the width (or precision) of the interval depends on the sample size.

The only criticism that could be analyzed is to see if the sample is representative of the population.

Step-by-step explanation:

a) We have to calculate a 99% confidence interval for the proportion.

The sample proportion is p=0.19.

 

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.19*0.81}{585}}\\\\\\ \sigma_p=\sqrt{0.000263}=0.016

The critical z-value for a 99% confidence interval is z=2.576.

The margin of error (MOE) can be calculated as:

MOE=z\cdot \sigma_p=2.576 \cdot 0.02=0.042

Then, the lower and upper bounds of the confidence interval are:

LL=p-z \cdot \sigma_p = 0.19-0.042=0.148\\\\UL=p+z \cdot \sigma_p = 0.19+0.042=0.232

The 99% confidence interval for the population proportion is (0.148, 0.232).

5 0
3 years ago
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