The mass of a substance, which follows a continuous exponential growth model, is being studied in a lab. A sample increases continuously at a relative rate of 8% per day. Find the mass of the sample after four days if there were 67 grams of the substance present at the beginning of the study.
Do not round any intermediate computations, and round your answer to the nearest tenth.

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Ответ:

yair7

20.09.2021

Mathematics

Step-by-step explanation:

Let the number of non-fiction books be x .

Then the number of fiction books= $\frac{2}{5}x$

Since, there are 56 books in the school library.

Then, $\\\Rightarrow\frac{2}{5}x+x=56$

$\frac{2x+5x}{5}=56\\\Rightarrow\ \frac{7x}{5}=56\\\Rightarrow\ x=\frac{56\times5}{7}\\\Rightarrow\ x=40$

Hence, the number of non fiction books = 40

Therefore, the number of fiction books = $\frac{2}{5}40=16$

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