The percent of n is bye bye
By the divergence theorem,

where

is the boundary of

. We have

so the flux is
Distance=velocity times time
d=vt
t=d/v, since d=8.715km and v=8.3km/hr
t=8.715/8.3
t=1.05 hours
(t=1:03, one hour and 3 minutes)
A single one of them is called a "vertex". It's a point where edges meet.
A triangle has 3 of them.
A square has 4 of them.
A cube or a brick has 8 of them.
Can you look around and find the 8 vertices of your bedroom ?