To find out how many miles Starr drives in 15 hours, we first need to calculate Starr's driving speed in miles per hour (mph).
Starr drives 495 miles in 9 hours, so the speed is calculated as follows:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{495 \text{ miles}}{9 \text{ hours}} = 55 \text{ mph} \]
Next, we can use this speed to find out how far Starr drives in 15 hours:
\[ \text{Distance in 15 hours} = \text{Speed} \times \text{Time} = 55 \text{ mph} \times 15 \text{ hours} = 825 \text{ miles} \]
Therefore, the answer is:
825 miles.