A Manager Wants to Analyze the Learning Curve Associated with Producing

Multiple Choice

A manager wants to analyze the learning curve associated with producing one of his company's products. Accordingly, he has gathered the following data: $$\begin{array} { | l | l | } \hline \text { UNIT PRODUCED } & \text { TIME REQUIRED } \\\hline \text { Second } & 5 \text { hours } \\\hline \text { Fourth } & 4 \text { hours } \\\hline\end{array}$$
Approximately how long will it take to produce the 10th unit?

A)  1 hour
B)  2 hours
C)  3 hours
D)  4 hours
E)  5 hours