Answer:
0.002833 sec
Explanation:
Speed of light in vacuum is 
Given distance = 850 km = 850×1000=850000 m
We have to calculate the time that light take to travel the distance 850 km
Time 
So the time taken by light to travel 850 km is 0.002833 sec
Okay, 90% of this is nonsense besides the numbers maybe.
Yes a perch is a consumer.
We have the meats Arby’s we beat them kids