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PolarNik [594]
2 years ago
15

There are 50 books side by side on a library bookshelf. Each book is two inches thick. How far is it from the first page of book

1 to the last page of book 50?
Mathematics
1 answer:
sveticcg [70]2 years ago
3 0

Answer:

100inches

Step-by-step explanation:

50books

each book is 2 inches

50books x 2 inches per boo = 100inches

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One light-year equals 5.9 x 1012 miles. How many light-years are in 6.79
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Option B

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Given that,

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1 \text{ light year } = 5.9 \times 10^{12} \text{ miles }

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Let "x" be the number of light years in 6.79 \times 10^{16} miles

Then number of light years in 6.79 \times 10^{16} miles can be found by dividing 6.79 \times 10^{16} miles by miles in 1 light year

\text{Number of light years in } 6.79 \times 10^{16} miles = \frac{6.79 \times 10^{16}}{5.9 \times 10^{12}}\\\\\text{Use the law of exponent }\\\\\frac{a^m}{a^n} = a^{m-n}\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = \frac{6.79}{5.9} \times 10^{16-12}\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = 1.1508 \times 10^4\\\\\text{Number of light years in } 6.79 \times 10^{16} miles = 11508

Thus number of light years in 6.79 \times 10^{16} miles is 11508 light years

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