## Question

###### Suppose that the total revenue realized by the Odyssey Travel Agency is $R=f(x)$ thousand dollars if $x$ thousand dollars are spent on advertising. a. What does $$\frac{f(b)-f(a)}{b-a} \quad(0<a<b)$$ measure? What are the units? b. What does $f^{\prime}(x)$ measure? Give units. c. Given that $f^{\prime}(20)=3,$ what is the approximate change in the revenue if odyssey increases its advertising budget from $\$ 20,000$ to $\$ 21,000 ?$

Suppose that the total revenue realized by the Odyssey Travel Agency is $R=f(x)$ thousand dollars if $x$ thousand dollars are spent on advertising. a. What does $$\frac{f(b)-f(a)}{b-a} \quad(0<a<b)$$ measure? What are the units? b. What does $f^{\prime}(x)$ measure? Give units. c. Given that $f^{\prime}(20)=3,$ what is the approximate change in the revenue if odyssey increases its advertising budget from $\$ 20,000$ to $\$ 21,000 ?$

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