Question 1091881
How many miles a day does the butterfly fly?
Then, 4000/miles per day = number of days
I'll give you a leg-up: 
1 hour = 3600 seconds
1 day = 24 hours
35cm × 3600 × 24 = cm/day - divide this product by 160,934 (there are these many cm in 1 mile). The resulting quotient is your answer.