Final answer:
Both estimations are not reasonable as they underestimated the actual total miles.
Step-by-step explanation:
To determine whose estimation is more reasonable, we can compare their estimates to the actual total miles that the cyclist traveled. Let's calculate:
The actual total miles that the cyclist traveled = 16.0 km + 8.0 km + 8.0 km + 32.0 km + 11.2 km = 75.2 km
Comparing the estimates:
Student A's estimation: 14 + 41 + 78 + 121 = 254 miles
Student B's estimation: 14 + 41 + 78 + 121 = 254 miles
Both Student A and Student B underestimated the actual total miles traveled by the cyclist, which is 75.2 km. Therefore, neither estimation is reasonable.