I'm so sorry, I dont think I can help. Your teacher wants evidence from the chapter witch I can not find for you.
:(
-Roan
its blurry and i cant see the complete question...
I would say that it hasn't increased 20% because 1. if the starting percentage was 18%, you would see a larger precentage but that isn't the case.
They stopped at a better location with grazing for cattle and shops for wagon repairs.
They planned on going to Fort Laramie but decided to stop at Fort Bernard instead (10 miles east of Fort Laramie) because they were warned that Indians were fighting ahead, the grazing for cattle was poor at Fort Laramie, and they could get wagon repairs at Fort Bernard.
I think it is present perfect.