(a) Which category accounts for approximately one-eighth of the publisher's total revenue? (b) Approximately what percentage of the total revenue comes from Nonfiction and Textbooks combined? Write your answer as a multiple of $$ 10 \% $$ - that is, $$ 10 \%, 20 \% $$, $$ 30 \%, \ldots $$

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We start by noting that one‐eighth is

$$
\frac{1}{8}=0.125=12.5\%,
$$

so we look for the revenue category whose slice of the pie is about $$12.5\%$$ of the total. (In the given chart the slice that is approximately $$12.5\%$$ is the textbooks category.) Thus, the answer to part (a) is “Textbooks.”

For part (b) we combine the percentages for Nonfiction and Textbooks. The pie‐chart shows that when the Nonfiction slice and the Textbooks slice are added the total is roughly

$$
40\%
$$

of the publisher’s revenue (since $$40\%$$ is the multiple of $$10\%$$ closest to the sum).

So the answers are:
(a) Textbooks 
(b) $$40\%$$.
(a) Textbooks (b) 40%

(a) Which category accounts for approximately one-eighth of the publisher's total revenue? (b) Approximately what percentage of the total revenue comes from Nonfiction and Textbooks combined? Write your answer as a multiple of \( 10 \% \) - that is, \( 10 \%, 20 \% \), \( 30 \%, \ldots \)

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