Answer
A) The increase between 2009 and 2010 is 9.79 billion dollars and the increase between 2010 and 2011 is 13.71 billion dollars.
B) This means the the revenue function is increasing and the Amazon is making profits.
Work Step by Step
Given
$$R(t) = 24.48(1.4)^t $$
\begin{equation}
\begin{aligned}
R(2010,t= 1)&= 24.48(1.4)^1\\
&= 34.27\\
\textbf{Increase} &= 34.27-24.48= 9.79\\
R(2011,t= 2)&= 24.48(1.4)^2\\
&= 47.98\\
\textbf{Increase} &=47.98- 34.27= 13.71
\end{aligned}
\end{equation}
A) The increase between 2009 and 2010 is 9.79 billion dollars and the increase between 2010 and 2011 is 13.71 billion dollars.
B) This means the the revenue function is increasing and the Amazon is making profits.
