there are 60 minutes in 1 hr.
every 10 minutes the factory makes 15 bears.
so 10+10+10+10+10+10 is 1 hr, and is really 15+15+15+15+15+15 bears, namely 90 per hour.
every day, the factory does that for 8 hours straight, so namely they make 90 * 8 teddy bears, or 720 per day.
let's make a table of bears per day
1 day............................... 720(1)
2 days............................ 720(2)
3 days............................ 720(3)
4 days............................ 720(4)
x days............................ 720(x)
so the amount of bears they make say "A" is per day is A = 720x.
what would be the fewest days to make 5000?
well, whatever 720x is, it has to be either 5000 exactly OR more, not less, then
5000 ⩽ 720x.
and dividing both sides by 720 we get about 6.94 ⩽ x.
so we can conclude that whole days, it'll be 7, since 6.94 is about 7 days, but rounded up to whole days it'll be 7 days.