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malfutka [58]
2 years ago
5

the ratio of the weight of a book to the weight of a mug is 7:5 what fraction of the total weight of the book and mug is the wei

ght of the book?
Mathematics
1 answer:
Elena-2011 [213]2 years ago
7 0
12:7
because you add 7 and 5 and then there is the 7 for the book weight
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Answer:

Sample size minimum is 60

Step-by-step explanation:

given that you want to create a 99% confidence interval with a margin of error of .5.

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Since population std deviation is known, we can use Z critical value for finding margin of error

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2.58*\frac{1.5}{\sqrt{n} }=0.5\\\sqrt{n} =7.74\\n =59.90\\n=60

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2 years ago
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Step-by-step explanation:

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Damm [24]

Answer:

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Answer:

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