To determine the superhero's speed in miles per hour, we first need to calculate how many miles he travels in one hour.
- Distance: The distance from New York to Los Angeles is 2,450 miles.
- Time: The superhero flies from New York to Los Angeles in 30 minutes.
Since 30 minutes is half an hour, we can calculate his speed as follows:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{2450 \text{ miles}}{0.5 \text{ hours}} \]
Now, performing the calculation:
\[ \text{Speed} = 2450 \text{ miles} \times 2 = 4900 \text{ miles per hour} \]
So, the superhero is flying at a speed of 4,900 miles per hour.
The correct answer is C. 4,900.