To find out how many miles you will be driving, we need to clarify the provided information. You mentioned that you need to drive the first "14" of the trip, but it seems that there might be a typo or missing information.
Assuming "14" refers to the distance you have decided to drive, you would simply drive 14 miles. However, if it means you are responsible for a portion of the total distance, we can assume you meant 14% of the full trip.
To calculate 14% of 448.6 miles: \[ \text{Miles driven} = \frac{14}{100} \times 448.6 = 62.784 \text{ miles} \]
If you meant driving a specific distance (like 14 miles, 14% of the total, etc.), please clarify! Otherwise, based on the choices you have provided and the context, 14 miles would not match any offered options. Thus, I'm unable to assign an accurate response based on what was provided.