To determine how many miles Starr drives in 15 hours, we first need to find Starr's driving rate (miles per hour).
Starr drives 495 miles in 9 hours, so:
\[ \text{Rate} = \frac{495 \text{ miles}}{9 \text{ hours}} = 55 \text{ miles per hour} \]
Now, we can use this rate to calculate the distance driven in 15 hours:
\[ \text{Distance} = \text{Rate} \times \text{Time} = 55 \text{ miles per hour} \times 15 \text{ hours} \]
\[ \text{Distance} = 825 \text{ miles} \]
Thus, Starr drives 825 miles in 15 hours.