\begin{frame}
  \frametitle{Indefinite Integrals: Applications}

  \applications
  
  \begin{exampleblock}{}
    \begin{itemize}
    \pause
      \item $C(x)$ is the costs of producing $x$ units of some product 
    \pause
      \item $C'(x)$ is the marginal costs
    \end{itemize}
    \pause
    Then
    \begin{talign}
      \int_{x_1}^{x_2} C'(x) dx = C(x_2) - C(x_1)
    \end{talign}
    is the increase in costs when the production is increased from $x_1$ to $x_2$.
  \end{exampleblock}
  \vspace{10cm}
\end{frame}