To find out how far the Acela Express would travel in 8 hours, we first need to determine its speed.
The speed can be calculated using the formula:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
Given that the Acela Express travels 775 miles in 5 hours, we can calculate its speed as follows:
\[ \text{Speed} = \frac{775 \text{ miles}}{5 \text{ hours}} = 155 \text{ miles per hour} \]
Now, we can use this speed to find out how far it travels in 8 hours:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]
Substituting in the speed and the time:
\[ \text{Distance} = 155 \text{ miles per hour} \times 8 \text{ hours} = 1240 \text{ miles} \]
Thus, the Acela Express would travel 1240 miles in 8 hours.