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Umnica [9.8K]
3 years ago
10

At the bookstore, 40 copies of a popular paperback book fit perfectly on a 5-foot shelf. How many copies of this book would fit

perfectly on an 8-foot shelf? A. 72 books B. 60 books C. 68 books D. 64 books
Mathematics
1 answer:
Ierofanga [76]3 years ago
5 0

Answer:

64 books

Step-by-step explanation:

The first step is to find the number of books that will fit in the shelve per foot

= 40/5

= 8

Therefore the number of books that will fit perfectly in 8-foot shelf can be calculated as follows

= 8×8

= 64

Hence 64 books would fit in 8-foot shelf

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Answer: 0.038

Step-by-step explanation:

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Critical z-value for 90% confidence: z* = 1.645

Margin of error =z^*\sqrt{\dfrac{(1-p)p}{n}}

The margin of error in a 90% confidence interval estimate of p =1.645\sqrt{\dfrac{0.2\times0.8}{300}}\\= 1.645\times\sqrt{0.00053333}\\\\=1.645\times0.0231\\\\=0.0379995\approx$$0.038

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3 years ago
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Answer:

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Step-by-step explanation:

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4 0
2 years ago
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TEA [102]

Answer:

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Step-by-step explanation:

To do this, line up the variables so it looks like this...

y-6x=-1

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y-6x=-1

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