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3 years ago

Tim has read 10% of a book. He has 45 more pages to finish. How many pages are there in the book?

1 answer:

6 0

if Tim has read 10% of the book, that means he still hasn't read 90% of it yet, and we know that that 90% is 45 pages, so say the book has a total amount of pages of "x", which is 100%.

$\begin{array}{ccll} pages&\%\\ \cline{1-2} 45&90\\ x&100 \end{array}\implies \cfrac{45}{x}=\cfrac{90}{100}\implies \cfrac{45}{x}=\cfrac{9}{10} \\\\\\ 450=9x\implies \cfrac{450}{9}=x\implies 50=x$

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Rates are used to measure a quantity over another.

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Given

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$r = 40miles/gallon$

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$r = \frac{d}{n}$

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$n = \frac{d}{r}$

So, we have:

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$n = \frac{17500km}{40miles}gallon$

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$n = \frac{17500km}{40km \times 1.60934}gallon$

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$n = 271.85\ gallon$

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$N = n \times cars$

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$N = 489330000$

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$N = 489330000 \times 3.78541L$

$N = 1852314675.3L$

In scientific notation to 2 decimal places, we have:

$N = 1.85 \times 10^{10}L$

<em>Hence, the number of liters used is </em> $1.85 \times 10^{10}$ <em />

Read more about distance and rates at:

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3 years ago

The value of m is a distance of 3 units from -2 on a number line. Which numbers, if any, could be the value of m?drag any nimber

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Step-by-step explanation:

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3 years ago

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To learn more about to determine the volume of a cylinder, check: brainly.com/question/9624219

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3 years ago

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3 years ago

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3 years ago

Tim has read ​10% of a book. He has 45 more pages to finish. How many pages are there in the​ book?

Tim has read 10% of a book. He has 45 more pages to finish. How many pages are there in the book?