Final answer:
The bus traveled a total distance of 315 kilometers by multiplying the speed of 90 km/h by the time of 3.5 hours.
Step-by-step explanation:
To calculate the distance traveled by the bus, we need to use the formula distance = speed x time. Given that the bus's speed (s) is 90 km/h and the time (t) is 3.5 hours, we can find the distance traveled by multiplying these two values together.
Distance traveled = 90 km/h x 3.5 h = 315 km
So, the bus traveled a total distance of 315 kilometers.